6mm Scale Comparison

OK so I have a company of infantry done up using GHQ "Modern British Infantry"
which is in fact a little larger than some of their earlier WWII stuff. For
those of you out there with a lot experience in 6mm models of all makes and
ranges, which ones scale most closely with the newer GHQ models? The GZG figs?
Baccus? Heroics & Ross? Irregular? GW Epic? Any suggestions of what would be a
good fit would be appreciated, and particularly about how the GZG figs compare
would be appreciated. Thank you all for your consideration.