I don't own a trackhawk, but it and the TRX are very differet. I'm hoping for a raptor fighter, (off-road tires, shocks, on board water supply, ect.) and the trackhawk is definetly not offroady. Still a street truck would be cool.
Ideally, one of each.
Both are absolutely stunning vehicles. Were it not for the TRX, I might already have a Trackhawk, but if I have to choose, I gotta take the TRX.
(which is odd because I generally prefer SUVs over trucks - the TRX is just that cool)