Quote: (vytzka @ 18 Dec. 2008, 07:48 )
Actually Carnifex starts at +1 T over a Hive Tyrant.
Fully upgraded, a Carnifex will have +1 T and one more wound over Tyrant but will lack an invulnerable Warp Field save.
Unless there's been a correction I'm not aware of, my (4th Edition) Tyranid Codex lists T4, W6, SV 3+ for the base stats of both Hive Tyrant and Carnifex.
And, yes, different Genus of Carnifex could be "tougher", getting Thick Rear Armour or other variables/weapons.
IMO a fex should have better armour than a Tyrant (even though in 40k are about the same)
to better represent its role in the brood.