Superior guitar player? Angus. A better fit for Kiss, Ace.
If you compare the two bands then I would have to say I like them about equal even though in his day Peter Criss was a way better drummer than Phil Rudd. I'd also say that for AC/DC Angus is a better fit.
Bands like that are about the formula (much like Pink Floyd and a few others) add or subtract any element and you could end up with something grotesquely worse than what you had before. Without the original four members (or someone who plays and thinks exactly like them) there will never be another Kiss of the early to mid 70s (the only Kiss I care for by the way).