Of course, he cannot compare to prince, but covers should always represent the artist who is paying homage to the classic. This definitely showed a side of adam that most do not get to see.
Quite right. Any artist will always want to do things the way they want to do them, that's the essence of creativity; being able and free to express yourself however you like.
There is no need to emulate an artists style in a tribute, just play the dead artists songs and talk about his life, hopefully about good works accomplished or things that they made better, or people that were influenced heavily by the artist.