For what it's worth, saw Def Lep in 2013 and thoroughly enjoyed. The sets are pretty static and it is very polished (including Phil Collens chest) but their distinctive sound is deliberately overproduced so I think it's to be expected, it's part of the charm. When you see them they sound like Def Leppard. Joe Elliott still sounds like Joe Elliott. So you feel you're getting the real McCoy if you're a fan.

Bon Jovi are a different breed. More successful but with a singer whose voice has just not held up anywhere near what it was in the 80s or 90s. Nevertheless, they continue to produce a lot more new music and fill stadiums. Maybe it boils down to Jon having whiter teeth.

On another note, has anyone else noticed that where Jon used to sound bad on a chorus but ok on the verses (e.g. always), now it's the other way round?!