Perhaps the Jet Ranger might be a bit easier to learn in....as some of the 500's attributes that makes it so much fun to fly make it a bit harder to master if new.
That being said....going to a Jet Ranger after flying the 500 is so boring!
The major difference is in the 500 you fly the machine using cyclic trim operated by your Thumb.....as the Jet Ranger has a standard cyclic system.