If i define him as inside SF, why don't i choose taller player like what i said 211~229cm for better training result?
If i define him as outside SF, why don't i choose shorter player like what i said 175~193cm for better training result?
because they still need "all" Skills, a inside SF still needs a lot of Ooutside Defence, Passing and shooting abilities(maybe in this order), a outside SF still need inside Defence, Rebounding and a bit inside Shot.
You could vary your player on offensiv Focus, which mainly change Inside Shot and Jumprange contribution(+ maybe a bit more passing/handling for the inside man) - but on defense you need to do everything.
I am just getting confused why 190~198cm would be a good choice for SF, will medium size player train faster in certain skills (e.g. jump shot, jump range, driving, outside defense)?
nothing goes faster, but the handicap is overall not that bad like with the extreme tall or small players so that in the end you will train a bit faster and you won't make extremly frustrating training weeks like outside defence for a 2.20+ guy.
But as i said it depend much on starting skills, i got two pretty Small SF who startet with very good inside Skills and just solid Guards skills - so i don't have to train the inside things so much(i mainly focus on ID and Reb), but i thing such things work better with Small guys because you need more outside Skills and you sometimes get a free ID up through Od training.