Run Devil Run

i found a new song recently...
its called RUN DEVIL RUN...
n it was actuali a demo recorded by Ke$ha...
n den it was bought by SNSD / Girls' Generation / So Nyuh Shi Dae / 少女时代 .....

u can listen to both version on YouTube...
which version is better???
or was it both sucks??
LOL... im jz curious so i ask u all... ^^

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RUN DEVIL RUN

KE$HA

VS

SNSD / GIRLS' GENERATION / SO NYUH SHI DAE / 少女时代