TL;DR: The M4 blows everything away, but isn't a general purpose machine. The N100 is slightly better than 50% of the power efficiency of the remainder. It's also slightly faster despite having less cores. Single core speed is looks to be twice the speed of ARM.
An N100 box with 16GB of RAM and 1TB of NVME is around the USD$200 mark, which is far cheaper than the Mac or Ampere, but in line with the other ARM options. It comes in more form factors with more customisability options than you can poke a pointed stick at.
All in all, it doesn't fair too badly. The low price, fast single core speed, and compatibility with everything makes up for a lot of sins.