Mac Studio M3 Ultra 28/60 96GB RAM or M4 Max 16/40 128GB RAM for AE?

Hi

Any advice please on which will be the best performing for my AE workflow.

I spend most of my time on a job animating, tweaking, RAM previewing, tweaking, RAM previewing, tweaking etc. Some jobs are light, others can be heavy with many 2D layers, large 3D bitmap layers, cameras and effects. I mostly still work at 1080p 25fps. The machine needs to be future proof and last for many years.

I'm considering either a Mac Studio M3 Ultra 28/60 96GB RAM or an M4 Max 16/40 with 128GB RAM.

My first priority is a machine that builds RAM previews the fastest (afaik a multi core task), second priority is a reponsive UI (single core task). So I'm confused as I know the M4 Max is faster on single core tasks and the Ultra is faster on multi core tasks - but in the tests I've seen, the multi core on the M3 Ultra isn't hugely faster than the M4 Max. But maybe someone can offer some insight that I've not gained yet. 

Thanks.