I've been debating going with partials if people like the info, but the truth is I haven't played many of them, and therefore am not qualified to answer. I can list those I have knowledge of, but for the rest, only if someone else does it or $DE raises the ship limit so I can "receive" the massive number of EBB's I'm sitting on. Not much point to bringing them out when I don't have space for them.

SN is the nation I've played the fewest EBBs from. 

i went digging here and culled and compiled the comments below to flesh out this section :

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Originally Posted by Vlad381 ; Benser33 ; angus725
Chapayev: A very good ship. When you get to lvl 29 use this and take some time deciding which CA branch you want (Krasny Kavkaz or Rurik) as it is quite do-able to skip Bogatyr/Pallada/Svetlana and just use Chapayev until CA level. If you look on the graph of how much XP you lose with sailor lvl. The situation is worse if the sailor is lower than ship but above not so bad. Up to 10 lvls above you get 100% xp, and up to about 25 lvls above you still get more than 90%. So actually it is realistic to keep your crew in Chapayev to lvl 54 without much XP loss, all the way to Gorki for example. I plan to use Chapayev until Rurik, or maybe all the way to Kirov.  The intended chapayev guns are later at Lvl 34, 3x 6" B-38 MK-9 Pattern 1938 (lvl 29 was the maximum level SDE allowed the ship to be, so the testing team increased the level of the guns instead). Let me tell u the thing is an absolute beast! Unless u plan to AA or TW, or just for the sake of something a little different, I don't see the point in any regular Soviet CLs. The only downside is Chapayev is a huge ship (big target, actually bigger than Kirov) and with lower durability and such; but as far as R and T slots go, the Chapayev is an easy choice, at least over the Svetlana. Plus it looks cooler, haha.

Originally Posted by GrieferLord ; ccreeder ; Benser33
Petropavlovsk: is basically a moltke on steroids, plain and simple. it has good firepower, good range and is rather robust. it can be used with or without AA or with the SD-2's instead of the dual 10" guns. The petro is very fun and one of the best PCA's a little OP but it is less OP than a mandel by far. Run either 10 inchers or HH on the R slots and generally the 3.1 minizi's on the T slots. The miniz's are a great aa gun provided nice reload and medium range with medium damage. the 5.1s hit harder and have more range but much slower reload and very limited shells. its a great ship with high lvl gunners but if you are a lower lvl player its a harder ship to play because that spread is rarther bad with as is reload at lvl. but its still a great ship. Use it to level most sailors to 60+. The range, ROF and damage of the SD-2s are decent, but you do need good reload gunners for them really. I would definatly say it is better than a moltke in the right hands. Only by a little though since you can still fit the 4.1" AA guns on the moltkes T slots. I have also used a moltke, which obviously provides a combination of excellent ROF and damage with relatively good range, but those guns are better compared to the Minizinis, which do slightly more damage with about the same range but twice as slow. Its an excellent AA ship, SN AA is very good, SD-2s for range, Minizini for short fast fire. Its much better than the svetlana, more dp, more total T slots at better angles, actually able to USE the SD-2s. The PCAs are all pretty much designed to be very good AA boats, it even says that in their item store descriptions. Obviously they arent all equally good, but the Petropavlovsk, Motlke and Asama are all very good AA ships. How it compares to the motlke is based on which guns you use imo. If you use the stronger, slower, long range AA I prefer the Petro, if you want the short range, fast firing AA, the moltke is better.

Originally Posted by newport ; zzprepro ; Benser33 ; hexxel
Sevastopol: Definitely worth it with 7 support slots and slightly higher speed than all other SN BB 1-3s and much better turning force. I'm really glad I have mine, especially since pbbs are so good for leveling. Plus, it performs pretty well, the spread isnt bad either (SN sevastopol has better spread than US-seva), but its not very consistant, nor is it ever brilliant. Sevastopol does not have great range in GBs, so you really gotta use your speed and high turning force and deploy hit and run strategy. The seva is deffinately worth getting. The speed is better than the other BB's at that lvl or even a little higher for SN, with the right engy setup it is great. The range is good for the lvl you can use it at. The key to using it is never shoot broadside. The gun layout will almost never let you get a tight spread with all 4 guns. You need to shoot at an angle, either forward or aft. The consistancy of the spread is determined by how good your gunners are and their lvl. I use both the US and SN seva. With a high lvl crew it is awesome. 900 SD, fast OH, and an awesome reload speed even with ACC gnrs makes it dangerous. Just remember that if you are worried about XP that you should move up to the next ship.

Originally Posted by dmcgill1 ; NewIronsides
Borodino: The range is exceptionnaly good for the level, it can fire at least at BB2 range if not close to BB3. However, since it has only 4 barrels firing per volley, the odds of hitting a target are low, and the damage output per second of in-range battle is low too, even if individually each shell hits fairly hard. The accuracy is fairly good with good gunners and the reload is fast, i suppose to help compensate for the small amount of shells per volley. Its main strength is its very small size. She is the smallest BB in this game, is only as big as a large DD but has the DP of a BB and as such it is very hard to hit. The best way to use it is to use your small size and range to go unnoticed and land shells on BB1-2-3-PBB as you're able to. You can end up with a decent amount of attack (and exp) while being useful to the team a bit. I do not suggest going after high end BB4-5-6s though, since their accuracy will definately take you out if they decide you are a threat. Globally a PBB is much more useful, specially the sevastopol that is also relatively difficult to hit, the PBB will also hit much more often with its 12 shells. The borodino might be small and hard to hit, but against shotgun-style shots, it'll still be hit. The ship itself is slow. goes 37 with 4 118+ engs with 3 reps on board. If you match up a sevastopol and a borodino, then definately and without any doubt the sevastopol is better. it has more DP, much more shells/volley that increase the hit chance and at least the same range i believe. but even if its not you should still get it for the extra support slots. The sevastopal also has larger T slot spaces so you can run the SD-2 OR Minzini AA setups.
If you're using the BB1 20 degree 12" duals you are doing it wrong, Borodino has her own special set of 12" guns, which unfortunately are 40 degree max angle. It hits very hard as well. Her 1899 gun set has higher shell dmg than the regular BB1 gunset and have about the same range as a seva, maybe even a tad more. Not that i have not sat down and tested the range yet, it's just my experience from battle. I've found that most BB4-6 still will have significant trouble hitting her, Borodino is just too small. One on one you'd have probably win vs the average bb4-5 player if you know what you are doing. If you dont have a BVE crew that are at least +11 base the Borodino will suck so hard you will not use it. If you are just trying to level you want the seva.
PBB Seva = 4 - 3X12" bb2.5 range .. 7 support slots (same as BB4) .. Base speed is