if tiana is friend with Charlotte i don't see why she wouldn't get along with Aurora

^ Agreed. I don't think Aurora & Tiana would be best of friends or anything like that but I think they'd get along pretty well and even enjoy chatting. (Modern ex: Aurora eats at Tiana's café and they usually have a little chat when Aurora is in). I think Tiana would admire Aurora's grace and poise and I think Aurora would admire Tiana's family values and straight-forward but self-less personality. I also think Aurora would sweeten Tiana out a bit which would be nice for Tiana.

^well, you have to consider that Tiana grew up with Charlotte like a sister. they tolerate each other's differences much better than they could if they were less close. and they probably don't even notice the differences much anymore.

Aurora is easygoing, mature and unassuming so she'd get along with most people. Tiana would be hard to be friends with but they wouldn't hate each other. they'd be OK, just not close, and wouldn't find much to do together for fun.

^ I see what you are saying but they are so different that I doubt they don't notice the differences. Perhaps that is true for Charlotte who didn't really see them in the first place but I'm sure that Tiana still noticed the differences.

They are too opposite in their values and priorities. Tiana is rational and doesn't prioritize romance, while Aurora is hopeless romantic, imaginative and somewhat eccentric. As AudreyFreak said, you have to consider that Tiana grew up with Charlotte like a sister.
I think their relationship would be peaceful but distant.

I feel like they would be acquaintances, who respect each other, but not friends