From what I've read, the Samsung memory got the timings less tight than the Hynix so it's supposed to be less hot.
At least after hours playing Kingdom Come Deliverance II with very high graphics (didn't try experimental settings), without FSR so, native 1440p, no coil whine, no weird glitch, the GPU didn't even make any noise.
It's 625€ without taxes (of course there is 20% VAT here so it's 750€), I think it's not bad. It's pretty hard to get a GPU at decent price in France. (
https://www.idealo.fr/cat/16073/cartes-graphiques.html?q=9070 xt&qd=9070 xt)
And I prefer buy from a renown website (this one is part of the LDLC group now but always had a very good support since it exists) than try my luck elsewhere when I spend more than 500€

Maybe I could have saved like 40€ ?