I have two Smoktech ARO Pyrex BCC's. I spent an extra $5 for some heads. No, the protank/EVOD heads don't fit - their collar is too big. The ARO coils seem to fit on the EVODs/Protank minis though, but I haven't tried firing them though. The AROs are nice tanks. They're bigger than the Protank Mini - I'd say they hold about 2+ml of liquid. I rebuilt all the coils I bought for them already - same exact design as the Kanger heads. With all the money spent on vaping crap, I wasn't about to ..... about $5 worth of separate heads for the AROs.... I just keep them in a separate baggy.
If you like EVODS, Protank Minis, etc., you'll like the ARO.
EDIT: I dropped an ARO from 5 feet. Didn't break.