ann d ones might be a touch loose, but should fit without any discomfort. i'm usually a us11 and i don't own a pair of cps but i think i'd be a 44 since i'm pretty sure my vandals have the same sole. having said that, i have a pair of ann sneakers in size 44 and they're tight. at first it was kind of uncomfortable, but after months they stretched a bit - still definitely a bit smaller than i'd prefer, though. for future pairs i'll look for 44.5s or 45s first.
pretty sure hes trying to snag a pair of cheap $150 sunsea to look like a pair of Ann D's.
Sizing aside, the difference is too big to recommend one over the other. Just get the Ann's.