There's super powered women (Clare + Jessika/Nikki + Monica = Buffy + Willow) and super powered men (Sylar + Peter = Angel + Spike). There's the guy who doesn't have a power but helps out behind the scenes (Mohinder = Giles) and they both have English accents! Kat's love (Heroes love = Buffy love) lol.
The only thing missing is the incredibly Joss Whedon humour. And Joss Whedon. He's missing too. :P But they're both trying to save the world, battling things with extraordinary powers etc.