4090m vs 5090m

I want to buy a high end gaming laptop that will last me for years for gaming and I'm generally confused because I see so much crap on the 5090 models already and to make things even better the current models available in my country ( only rog strix) 5080 and 5090 are like 1000-2000 euros more expensive then a average 4090laptop which are around 3500-4500 euros. Is the 5090 even worth it or should I just buy a 4090 especially since I would liked to play the arkham games for example and the ezio trilogy both which apparently won't be really playable on a 5090(rumors I guess) which actually sucks