looks like the total power draw of an n100 mini pc is 8-27 watts total, while the pi is 4-9 watts but it has a faster cpu, better video decode, vastly better gpu and better compatibility, being x86.

Ultimately the decision is up to you, but i think that outwheighs the higher power costs.

as i see it you can get an n100 mini pc with a 6w tdp for as much as a 8-16gb rasberry pi 5 kit

You could install android on something, and run one of the open source TV launchers