I'm going for this....mostly sung in the lower register where his voice is much better and he manages to convey a depth without resorting to yelping and over egging it.
Worth keeping in mind the vocals here were done in 08/09 - in that regard it's a great effort and for me that makes it worthy of this choice for me...a great performance dredged up from a singer in terminal decline (if not totally in terms of ability, then certainly for me in terms of how he sings/chooses to sing) - that makes it special.
They fit really well with the then 25 year old music too, no mean feat - Bono sounding rich and deep and capturing and conveying the feel really well, without resorting to all the bad things he does in the 00's.
Maybe his last truly great recorded work.