For offence killmonger can take down a wider variety of foes while medusa really only shines against champs who rely on armor ups and robots on offensive use only, her auto block makes her more of a pain on defense. While Killmonger can take on stun immune champs with his counter punch, champs with power gain by tanking the sp3 repeatedly( there is nothing more funny then fighting a Hyperion with killmonger) overall I think killmonger is the more versatile offensive champ, for my money.
Comments
Medusa for both. Killmonger can only compete with synergy bonuses but if you factor in synergy bonuses Medusa crushes him even more so.