https://en.wikipedia.org/wiki/Guns_N%27_Roses#Tours

Such non-sense. He's done WAY more touring than Jon has in this decade. The only extended break (more than 2 years) from touring he took was 1994-2000.

To answer the question, there's no comparison. Neither is close to his prime, but Axl can still give a great perormance and Jon, obviously, can't.

The frustrating thing about Axl is that he picks his spots. He always sang with a screechy head voice, which he still can use, but I guess it's much more demanding for him than it used to be. During his own shows (GNR) he holds it back and uses his clean "mickey" falsetto (e.g. SCOM, NR) which doesn't sound good on YouTube (it sounds actually much better when you're live), but when he pulls out his old voice (which is usually 4-5 songs per show with GNR and the whole AC/DC show), it's still magical; examples: