Both of the demigods are similar by being heroes, sons of Zeus, strong warriors, and the two were both born with a curse. As i was saying before these are the littlest BUT important similarities between the two.
Perseus is different from Heracles by many ways, Perseus was a great demigod, he has done amazing things to benefit him and to save many other people, one of the things is he risked his life for is mother by going on a mission to kill Medusa, another thing is that he killed serpent (this may sound like a negative thing he could've done but