Galaxy S25, talk me out of it!

I got my S23 in september 2023, as a long term purchase. But now I am considering upgrading after all.
I can get the S25 for €550, €100 cashback from Samsung and €290 from trading in my S23. But I need to switch my phoneplan to €20/month instead of €15/month for the next 2 years. So if I calculated it correctly I'm only paying €160 for the upgrade, and another €120 spread over 2 years.

There is nothing wrong with my S23, but I feel trading in now might be the smart financial option at this moment?

I don't really care for AI features, but the improved gemini/bixby seems cool.

The improved battery life would be an advantage, but not a reason to switch on it's own. How big would the difference be?

Slightly improved camera?

A tiny bit lighter and narrower than the S23?