Get the inferno - You won't regret it.
Also pay attention to the footprint (Base size/area) of the Venom. If it's the same as the T-Rex you will have trouble making it work with some boards because then it won't "Fit" into the socket area without conponents around the socket area itself interferring with it going into place.
It does look to be the same or very close TBH.
I have a T-Rex and there are some boards I can't use it with due to the massive footprint it has, the F1 is certainly not a bad one to get and use regardless.