Well i have these three , True rev.C (lapped with pressure mod) ,MegaShadow (stock) and Venom X (stock), and my personal impressions.

Performance wise its.
1.Venom X (stock) & True rev.C (lapped with pressure mod) (Venom 1C better but thats within error margin)
2.MegaShadow (stock) (about 4c worse then those above). (I know some people keep saying Megahalem is better then True but that was not the case for me , maybe better then stock TRUE ? )

Mounting system.
1.Venom X (awesome with cookie on top)
2.MegaShadow (awesome mounting system)
3.True rev.C (stock mount sucks)