This topic has been well researched and discussed in multiple other long running threads on this forum. I think it’s old hat for many of the forum regulars and the information is easy to find on this topic with some light searching and an hour of reading or so. Plus it’s a holiday weekend so that would all point to light and slow response on this topic.
Both will work. YMMV and you will need to do some extra research to make sure you have the right versions of your specific Mac or PC plugins and know what runs under Rosetta if you choose Mac, etc.
Specificlaly on the PC side you need to make sure that the base latency of the laptop and the processor type are best for your use case and I’d choose one where you can boot into BIOS. Lots of info on both topics on this forum.
Specifcally on the Mac side… you could try an older Mac but the safe bet would be their latest hardware.
Ultimately you’re going to need to do some leg work.
That’s by no means an exhaustive answer to your questions nor really any opinions on the old mac vs. pc topic, which is what that topic so often devolves into. Both platforms are very well supported by GP.
Here’s a couple intially search queries on the topic:
Useful threads: