McCann - the new addition to the cast of the ITV2 reality series - explained that she thinks the E4 rival show is "more artistic".
She told The Mirror: "It is a totally different show. It is a similar concept, but totally different people and lifestyle.
"Their show is shot a lot better, it's more artistic. Their whole thing looks like it's been Instagrammed.
"Everyone looks gorgeous, like it's had a filter over the whole thing," she added.
The 22-year-old is a close friend of Sam and Billie Faiers and is in a long-term relationship with the younger brother of Chloe Sims.
She said that she is looking forward to "having fun" on the show.
"I love the drama. I'm a very honest person, I say it as it is and I'm quite opinionated so if I disagree or agree with someone I'll make it quite clear that's how I feel.
"I'm just looking forward to having fun and letting the drama unfold," she revealed.
Watch Digital Spy talk to The Only Way is Essex cast members below: