Because you cut up your inxi output its missing some important things … like whether or not you have SWAP.
Other comparisons are also missing … like kernel … I’m gonna guess that your older frozen pool distros are using older kernels. (and why you would chase new ones with all this old hardware is questionable anyways).
both are the latest distros and updated, the SWAP partiton is about 6.70 Gb, the difference could be on a setting or dependency of xorg->X11?
I have found on bios I could give forced 2Gb of ram to the iGPU, but still green and pink artifacts present, gained about 20fps extra and more fluid, i can play now with a better resolution …