It’s a very interesting battle.

LETS GET READY TO RUMBLE!

If Puss stabs Death in the neck Death would bleed a little bit and on the other hand Rick Prime wouldn’t bleed at all.

Death would hate RP. It's clear Prime believes himself to be a god and as such would believe himself to be superior to Death, which would greatly offend the grim reaper.

Rick Prime is practically death with the Omega Device so him