New!Suzaku would hate Old!Suzaku for his failure to save everyone. Because that's such a reasonable goal.

Oldzaku would agree. And probably tell Newzaku to look out for pink princesses and prettyboy princes with fabulous hand gestures. Maybe pass on some genre savvy that was rather hard-earned.

So Newzaku might have an eventual, grudging appreciation for his other version. But he'd never want to turn out the same way. Ever. He will save everyone damnit.

Short version: he didn't really change at all.