I can’t answer those questions, but a Campagnolo pro shop that that is active online and does shifter conversions has repeatedly posted that centaur 11 is different. Why would shimano and dura ace have any impact on Campagnolo? Besides, Shimano didn’t just do this with dura ace. Tiagra 4700 is not cross compatible with historical 10 speed.
https://thecycleclinic.co.uk
https://weightweenies.starbike.com/f...p?f=3&t=150319
It’s not a lot to go off of, but people saying “it works” without trying it is nothing to go off of.