AITAH for telling a girl i would never live where she lives because of the type of people that choose to live there?

for context, i’m a first year university student at a pretty big school. all first years here are required to live in student housing, but you get to choose between a traditional dorm and this other building that’s a lot more expensive. anyways, last night i went to dinner with a couple girls from my high school that also go to my university. one girl there, emily (fake name) is someone i’ve never really gotten along with. i don’t want to give too many unnecessary details but she’s rude, stuck up, judgmental, etc. anyways, emily lives in the expensive building and brought it up at least ten times throughout dinner (the rest of us all opted for the dorms). eventually she said "i don’t know why you guys chose to live in the dorms, its so much better in x building" i was really annoyed at this point because literally nobody cares that she lives there so i said that i would never want to live with those types of people. she asked what type i meant and i said the annoying and stuck up type. she was pretty quiet for the rest of dinner and left as soon as we paid even though we had all planned to get cookies after.

i probably wouldn’t have said anything if that was the first time she had brought it up or if the building she lived in actually was better, but its literally the same as the dorms. the rooms are identical, you still have a roommate and you still have to use communal bathrooms. living in the dorms is already expensive, but being in that building is an EXTRA 10k a year. the only benefits are location (its right next to downtown where all the shops and restaurants are, most dorms are about a 30 min walk away from that area), there being a dining hall in the building, and the fact that theres a parking garage and they let first years bring their cars, something you typically can’t do if you live in the dorms. even then i don’t think its worth it. all the dorms have bus stops super close by that go downtown, there’s two other dining halls on campus, both of which are accessible by bus and also like a 10 minute walk away from the dorms, and you can buy a parking spot on campus for like $500 a semester. granted, there is a very limited number of spots, but it’s also pretty common for people living near the school to rent out their driveways to students for much cheaper than what the school charges. theres also buses that go all over the city. the point is that living there is purely a status symbol and it attracts the most insufferable people at this school.

i didn’t really think i was in the wrong but after emily left my friends told me that what i said was mean and that i should apologize to her. i kinda think she needed to be humbled a little but i am willing to apologize if what i said was too cruel. AITA?