Besides the difference that Megan pointed out, where one is more formal than the other, 내(제) 이름은 dejanae입니다 translates to "My name is DeJanae," whereas 저는 Dejanae에요 means "I am DeJanae."
Also, i think your name written in 한글 would be 데자내, but I'm not 100% sure :p
I hope that helps n____n