Tyre advice: how many types of Pirelli P Zero are they?!

[MoFoHo]

Hi all, I need some advice. Are there any knowledgeable tyre nerds on here? 4 photos. The 1st 2 photos are of my front tyres. They are...Pirelli P Zeros, with quite a thick bead that protects the wheel. The last 2 photos are my rear tyres. Also, Pirelli P Zeros, but they are definitely different, not as pronounced rim protection. I hope the difference comes across in the pics. I need to change one of these rear tyres. A thorough vehicle check by a BMW specialist in Leeds I use, identified a cut in one of the rear tyres, so it needs to be changed. Obviously, I'd like it to be the same type of Pirelli P Zero! I didn't know there were different types!? Could anyone please advise me what are the different types? Also, a 2nd question if I may? My car has CCBs. Expensive, potentially delicate things. Do any owners have these types of brakes, and if so, whom do you trust to take off the wheels? I'm in the UK. Whilst getting my company cars tyres changed last month, ATS just advised me that they clobber them off with a sledge hammer, not confidence inspiring...