it could be because most people dont compress oh`s (i dont) so they may have more dynamics. One trick that I believe james murphy uses, is to put a limiter on the oh`s with the snare track sidechained to it so that it only clamps down when the snare hits.
is the snare causing the overheads to peak out? you need to find out what is causing your oh`s to peak out (like does it happen on a china hit, or snare hits, or loud crashes...)