Always the bigger growth is better... sailors with bigger growth at the roll cancel out
bigger ability.

Take your +12 and +11. Although the +12 has 6 points less in ability right now... in 6
levels he will cancel out the +11 sailor since the +12 will gain 1 more ability point.

+12 +11
25 31
37 42
49 53
61 64
73 75
85 86
97 97 Canceled out at lvl7
109 108
121 119
133 130
145 141


The +13 sailor will always be higher than the +12 and in 1 level it will be already higher
than the +11.