Please check the stats before you buy! (
LINK)
The only reason for going for that 2.4 is if it's a REALLY great price and you really want the V6, but just can't afford a 3.0. I've only driven one of those (2.4's) once, but it was a short and desperately unimpressive test drive.
If you're comparing the FWD 3.0's, the fuel economy is exactly the same (the 3.0 is a much newer, lighter alloy, higher performing engine).
The more readily available and cheaper is the 1.8T which is bit lighter, so although the 2.4 has more power (<5% more), they have the same the torque and the 1.8T feels faster because it is turbo charged, so that torque curve is pretty flat (you'll have more torque for more of the rev range): there's only 0.3sec in it, but the 1.8T is QUICKER than the 2.4 V6 at the 0-62mph dash and that difference will be all the more obvious within gear, when cruising...
The fact that most of those 1.8T engines will remap to around 200bhp and the 2.4 will struggle to remap to 175bhp should not be overlooked.