Can't really go wrong with either.
Freeride = I like to go fast and carve down the mountain. You want stiff bindings for this.
Freestyle = I like to hit jumps and spend time in the park. You want softer bindings for this.
Targas are very customizable in that you can change out the inserts in the ankle strap to make it soft, medium, or stiff.
Cartels are obviously good too, or else T.Rice wouldn't ride them on his Lib.
T-Rice is riding Union now
But yeah, before that he rode Cartels for a long time. They're solid bindings. I think I would give an edge to the Targas though, more customizeable.