4 cores instead of 10 cores, 69W TDP instead of 22W, UHD Graphics 730 versus Apple's 10 core GPU (0.5 TFLOPs vs about 4.3), 23% worse single core performance, 45% worse multicore, and much louder cooling.
It's not a fair comparison.
I have 13th gen i7, with 64 GB RAM and 2 TB ssd (and 2.5 GbE). It was 800 EUR + VAT, last year. How much would similar Mac Mini cost?
Not a fair comparison either.
Edit: 69W for the NUC is not TDP. It is 69W power brick that ships with the machine.
I made a fanless NUC 7 (!) years ago with a special case, and it's perhaps due for replacement.
Apple is certainly out of their mind on storage. But on a desktop it’s trivial to plug-in an external disc that you can buy at an absolutely reasonable price instead of the insane Apple one.
And while you can plug in storage, I think it does kind of ruin the appeal of having such a small device by having a bunch of spaghetti cables. And if the boot drive goes it's not easily replaceable and makes the machine a brick until it is.