The 7900x3d has 6 cores with extra cache vs the 8 of the 7800x3d
You may need to patch your kernel to get wireless working. I just turned mine off in the bios and have an external usb BT adapter.
https://bbs.archlinux.org/viewtopic.php?id=286981
List of wireless drivers included in the kernel
https://wireless.docs.kernel.org/en/latest/en/users/drivers.html
I have a 7900 non-x3d and it works great for me
If you’re focused on gaming there’s nothing better right now than AMDs 7/9800X3D