There's no harm in giving them a whirl Phil
The most benefit you'll get is that they'll slap and slow down faster in quarry, like the Baracuda Hunter Extreme do because of the greater frontal area - they certainly won't expand at sub 12.
Maybe they are geared up more for FAC - I certainly wouldn't want to be shot in the arse cheek with one at 900fps
In a recent test with my '77, FTT Green actually gave better accuracy than Hades over 30 yrds
But, I do enjoy a bit of pellet testing so, fill yer boots mate
.......... if I still had some,