She is way too* different.

OMG 'she's not latina, so we gotta hate her' the fans are as childish as the original show itself :DDDD

Yes, she is a great character. She is awkward, smart, and kind. I really related to her character.

She can't be "too different" when she wasn't even in the original Winx Club show.

She is Flora's cousin, and producers have said they plan to add Flora to season 2.

Oh yeah! Terra can't be way too different, she is not Flora at all nor exist in the original version. The only similarity is that both Flora and Terra have fairy powers related to nature.
I first thought that her character might be weak...but she totally surprised me when she talked back to Riven (which is still fresh in my mind).She is strong in her own way . I LOVE HER!! ❤

She wasn’t in the original show yet she was one of the winx in Fate and that really bothered me

I have mixed feelings about her...I liked her in character most of the time, but I also agree with @LovelyWinxIcy, Winx was sorta like a clique in the show, not even Roxy & Daphne were considered part of the group, so Terra being in the Winx in Fate but not the animated show is weird to me. Also she reminds me a lot of Flora which just makes me wonder where in the world is even Flora anyway...