>>105977322
Get the 9070 XT; the slight raster performance advantage of the 7900 XTX isn't worth the added cost.
https://de.pcpartpicker.com/product/389nTW/xfx-quicksilver-radeon-rx-9070-xt-16-gb-video-card-rx-97tqickb9

9070 XT Prime or Hellhound if you want something quieter.
>VRAM
By the time the 16GB VRAM ever becomes an issue, the GPU itself will be too weak to run games at a high quality & performance.