it depends more on what you think the opponent will play in offense than what your players are like.
by playing 3-2 all the time you're leaving your inside vulnerable to a team that has decent big players and by playing look inside he would have a big advantage.
it's ok to compensate your weaknesses by playing zones, but by playing the same all the time your opponents might take advantage of it.
but now that I took a look at your games, I don't think it makes much difference, since when playing 3-2 both of your defs are equally awful (and I mean that as a rating
)
you should strive to have equally good defense outside and inside so that with man to man they are balanced and then play zones when you're sure that your opponent will play an outside or inside tactic, and play m2m when you think he'll play base offense or push the ball.