FWIW
From a current Boeing Ops Manual/FCOM
P2... "Cross checks flight instruments and when radio height is increasing calls "Positive climb"
I suspect
some of us are "sweating the small stuff" here, since rule one, common to us all, is: "don't crash"....the exact answer as to procedure and terminology is going to vary from company to company. IMHO the correct answer is do as your FCOM says, as your trainers teach and what your checkers check, regardless of whether it's a Boeing or an Airbus.