I always found that if I listen to the basic chords of a song payed one way by your beginner or average guitar player, and someone who has some advanced skills, the more advanced player will still play the same basic chords but just add things like "hammer on's" and "pull offs", and a string bend here or there.... it makes the tune much more enjoyable with just these small additions. Almost as if there is more going on than just a single guitar. It is still the same song, just played using a handful of "Guitar Tricks". <-- plug