Tyres and their weight

Hello together, I would be interested if tyres of identical size should generally have the same weight. I ride the 245/45/18 100Y Runflat in the summer. When changing to the winter tyres I noticed that the wheels with Hankook-S1 Evo2 tyres are considerably heavier than the wheels with the Pirelli P7 on the rear axle. I find that a bit strange, especially since I had massive problems with the Pirellis on the front axle with imbalance since these a nasty height I’m sorry. I’m sorry. I’m sorry. I’m sorry.