What is the difference between doing suicides and scrimmages in sports?

Answer 1

Scrimmages are practice games, persay. Basically, you just play among your own team, simulating another game.

Suicides are a kind of sprinting drill where you have to touch a line, go back to the starting point, and then touch another line further away, go back to the starting point, and so on. On these, make sure you don't burn yourself out by going too quickly, or else you're screwed.

Answer 2

Scrimmages are practice games.

Suicides are a form of training, mostly running.