I think the RMD will have better balance than the S5.
Either way, I will buy whatever they grace us with here.
I find a slightly weight forward balance preferable in nearly all my knives. It seems to make them easier to use for just about everything. Oddly enough, its what makes the S6 seem like a smaller knife.
My G10 RMDs are definitely handle heavy and I don't find that an especially desirable attribute in an outdoor knife.