Neither. They are overkill for the everyday work aof a hobby sketchupper 
But ok, fine, someone asked the same question a while ago, this was my answer
tl;dr I would pick the M2.
M1 is 3,2 GHz M2 is 3,5 and SU needs a high clock. 3D softwares work on a single core, the faster the better
the M1 will become obsolete before M2, within a few years we’ll see softwares asking for M2 or more, especially in pro machines.
Because of the integrated RAM, quantity is not as crucial as on a PC : my M1 mac has 16gb and gets better results in SU or photoshop than my gaming PC with a slower CPU but twice the RAM.
The limit between 32 and 64Gb would appear while rendering, working with multiple huge files (I can work on 500mb files with 16Gb ram) or working with multiple softwares open at the same time.
It would be vital for audio or video editing and rendering, less so in our case. especially since :
yeah. that would be smart, if you can afford not selling it, keep it as a rendering machine. Pre-parameter everything on your mac, when it’s ready, leave the PC do the work on the side. especially if you use Vray / Enscape, it works super well with Nvidia.