No, they are both aoe skills(sort of), corpse take goes like this Step 1. Hit a group of enmies with Corpse take Step 2. Kill said group of enemies Step 3. Be healed and corpse explosion works in a smilar fashion Step 1. Target ONE enemy in a group of enemies and hit him with Corpse Explosion Step 2. KILL the enemy you cast corpse explosion on Step 3. all other enemies in the group are now hurt by a DoT the DoT from corpse explosion is pretty weak IMO, i never used it after i tested it