In computing|lang=en terms the difference between reload and reload

is that reload is (computing) to refresh a copy of a program in memory or of a web page on screen while reload is (computing) to refresh a copy of a program in memory or of a web page on screen.

In firearms|lang=en terms the difference between reload and reload

is that reload is (firearms) to make one's own cartridges using spent (or new) cases and new powder, primer, and bullet/shot while reload is (firearms) to make one's own cartridges using spent (or new) cases and new powder, primer, and bullet/shot.

As verbs the difference between reload and reload

is that reload is to load (something) again while reload is to load (something) again.