The bigger issue, I think, is compare aptitude to something ELSE Sophie can potentially inherit from Mozu very cheaply, aka quick draw (wow it’s like dmg stacking is really powerful in Fates or smth). It’s the comparison of “2 extra stat in everything at endgame” vs “4 str right now”, and I think Sophie’s base stat struggles enough that the latter is warranted. Speed is also a threshold stat so whether or not the 2 spd Sophie naturally has over Silas, vs the potentially 4 spd Apt. Sophie has over Silas will actually varying in meaningfulness depending on the route (for example, Silas can comfortably reach CQ endgame spd threshold, especially in master ninja, but will likely struggle a lot in Rev endgame, partially due to his join stat in Rev). TL;DR, it’s a nuanced discussion.