I'd say it depends on you, your experience and responsibility. I have a KFX400 (same as the LTZ400) and a Raptor. The rappy is in a whole different league when compared to a 400, and they can get you in trouble if your not capable of handling the power/speed.
With that being said, after riding the Raptor for the first/second day camping I got on the 400 and pulled a hill, got back down, gave it back to the wife and said this thing needs some performance upgrades, got back on the raptor and took off.