about ch 18-21, yeah
On random mode, a 20/5 Brom's chance of having enough spd to double something with, say 11 spd, like a 19-20 Fighter, is about 94%. Gatrie's, on the other hand, is about 54% (and this is assuming Gatrie also gets the KW from lv 10 rather than lv 13). Brom's chance of having enough spd to double something with ~14 spd, like a lower leveled paladin or a 18-20 lance/axe/sword/bow knight is about 37% while Gatrie's is about 6%.
Soldiers and halberdiers of the same levels run in the 11-13 range. Mage/sages and archer/snipers run about 13 spd.
Brom's chance of having enough spd to double a 13-ASer is about 60%, while Gatrie's is about 15%. (info from http://fea.fewiki.net/ ... like this)
This is a rather substantial difference. Don't try to say the spd difference doesn't matter. It very much does.
And on fixed mode, the difference is even bigger. Brom's 18 spd doubles all those 14-12 spd doods with more or less a 100% chance, while Gatrie has a 0% chance to double any of them and may not even double the 11 spd ones (borderline 14-15 spd, and equipped weapons affect growths as well; like steel lances and javelins, for example, both reduce spd growth by 5)