it varies
for example, alloy/lightweight frames, imo, tend to have more felt recoil than either poly or all steel (or same calibers and/or similar setups); h/w, imo, "NO", not all metal frames have "significantly" less recoil or muzzle flip--maybe less, maybe a tad more
as to muzzle flip, that seems to be more variable on bore axis height (*debatable), ammo (caliber, load, and pressures), etc
other considerations: recoil spring weight and how YOU hold the firearm; the best method in adapting to recoil/handling of any firearm is how one handles it (good form, positioning, and application) does most of the work imo
FWIW: some say that poly frames, like glocks, tend to recoil less b/c the frame can 'flex' and disipitate felt recoil more; all steel frames tend to weight more and also have the same affect