Which One Is Official?

So that's how they doing it in the industry now? Karina Pasian, 16-year old Def Jam artist that Jay-Z and Diddy was fighting over but Jay eventually got her after offering her a seven-figure deal, also recorded "Official Girl". "Official Girl" is Cassie's first single off of her upcoming sophomore album. Here are both versions:
Karina Pasian- Official Girl
Cassie- Official Girl

So who sung it better?? Karina can SING so I give it to her. Cassie can't sing so if she goes head to head with anybody that's an automatic loss, sorry! But Cassie has stepped her game, I can't lie.