Similarly, Jimi Hendrix can surely claim to have recorded the definitive version of "All Along the Watchtower".
Actually, there's got to be a pretty long list of songs written and recorded by Dylan that somebody else recorded the definitive version of. PP&M covering "Blowing in the Wind" comes to mind.
Bowie and Iggy were friends, and for many years (maybe still to this day!), the songwriter's royalties for China Girl were Iggy's primary source of income. Which I think is great. Like a form of patronage. Bowie was a great guy.
Though I prefer Iggy's version of the song.
Siouxsie & the Banshees cover Iggy's "The Passenger", and Ms Sioux wins this time.
Now if only Bowie had covered a Banshees song, the circle would be complete.
What makes you enjoy it more?