Here is a video comparing the new mini to some of the similar looking PCs if interested:
I think the Mac is unassailable on power vs. heat, noise and still having an internal PSU. I probably wouldn't consider an x86 system in
such a small case because of heat and noise - just get something in a micro-ATX case that would sit out-of-sight under the desk. Actually, I've already got an old MicroATX PC (formerly a Hackintosh) in a nice Fractal Design case sitting under my desk, which could be updated with modern components... Or, compact, quiet, but not-so-insanely-small PCs are available (e.g.
https://www.quietpc.com/ - just an example, not a recommendation).
Cramming something into such a small space is a job for ARM, and I'm still waiting for something to fill the gap between a Raspberry Pi and a Mac Mini... Qualcomm's Snapdragon-X developer system briefly looked interesting but apparently turned into a shambles and was withdrawn.
That video does rather gloss over Apple's problem with RAM and SSD though -
all of those mini PCs have 32GB RAM and at least 1TB of (usually expandable) SSD vs. the Mini's measly 16GB/256GB - and upgrading the base Mini to 32GB/1TB adds a totally ridiculous $800 to the price, making it by far the most expensive machine there.
OK, you may have other reasons for getting a Mac - but I'd call out that video in particular because - although they do briefly note the RAM/Storage cost issue - they go on to rave about the Mini's price/performance as if it only cost $600 - and although their speed tests may not be affected, if you were doing that sort of content creation in real life you might well hit the limits - esp. the SSD. Apple's base RAM bumps have at least made the base spec credible - but it's still fairly modest - and that 256GB SSD is still beyond a joke in 2024. 1TB/32GB is
not a super-deluxe, serious-callers-only high spec in 2024, and, sorry folks, an Apple byte holds the same amount of data as a PC byte.
In short, if a base M4 16/256GB Mini or a base M4 Pro 24/512GB Mini meets your needs then they are
great value for money c.f. anything PC
but the second you need more RAM or internal storage, that advantage evaporates... what's the point of having a super-compact PC if you immediately have to hang external SSDs off it?
Some of the cheaper, less-powerful mini PCs also fill a gap for home/media servers because they come with 1TB storage and/or could easily and affordably be fitted with a larger M.2 SSD. The base Mini (or even second hand/refurb M1 or M2 Minis) would be
ideal for this if only it came with a sensible amount of internal storage.