i've used both
I own a 432,in case i'm accused of bias.......
432 has better protection,similiar mobility,but harder to service, track system is similiar.
I've seen mikes get hit with rpg's and they just burn, til your left with rollers and pack.
Seating, in Israel the seats were moved to the centreline, back to back. Kit storage was built up over the tracks, helping to stop spalling injuries.
Based on my own experiance and barrack stories I'd rather use a 432.