I came to conclusion 230AF were released before 200AF, can not prove it right now, so take it with a grain of salt - as a food for thoughts.
AAA cells for 200AF isn't such a heaven's gift - this cells are of much less capacity than double lithium cell which also never leaks like AA and AAA's. Yet lithium cell goes strong until it's empty not having mid-life weakness. But if you like to go through sets of AAA's for some reasons it's possible to use battery holder from 200AF on 230AF.
For low light focusing there's some remedy - you know, Yashica 250AF TTL flash has AF assist light so with some bounce it's useful tool. Or use SCA adapter with integrated AF light which allows to have advantage of AF assist light without actually firing flash. This only works for 230AF as 200AF doesn't support TTL flash. In my opinion 200AF isn't worth bothering with as 230AF isn't expensive camera. Not only because of TTL. Well, 200AF were choice back then because of price diff.
And thanks for clarifying relation to Minolta, I've seen some notes on similarity of lens mounts but not so on bodies!