doomsday needs first hit, martian gets 1st hit, i find doomsday is very dependent on getting off to a good strat
doomsday is only good in the corner, martian can counter this in a variety of ways. with the life lead he can turtle himself with close orbs, on knockdown
when doomsday gets trait there of plenty of ways to rack up damage and stall him, including mb orbs in front and pillar, trait there naked down 1s into back dash,
Doomsday needs trait or meter or he can't get in, i'll sit outside of shoulder range and punish on reaction with mb b3, and mix up my dashes and jumps so its hard for you to react and i can smack you with trait and start orb pressure before you have time to mb shoulder. then there is the interactable game.
midscreen martian gets way more damage in the guessing situations and d1 earthshake is very blockable.
he has to risk doing different kind of mixups all which if martian guesses right he gets big damage and setups off of. risk reward is in martians favor
its a slight advantage martian in my opinion