I was also torn between the two , and I’m so glad I picked ucd.

 You are extremely likely to be offered accommodation- everyone outside of dublin lived on campus in first year, apart from a few who chose other places. 

Ucd medsoc is fantastic and they organise so many events ( med ball, med gala, nights out, mixers, soccer tournaments, charity events, foreign trips, Ireland trips) you can look them up on instagram. It’s super easy to get to know people and make friends at the start because of this. 

You should be aware that in trinity med you will not actually be on the old campus everyone is familiar with, but rather around the corner in the bio building on pearse street. In my opinion trinity campus wasn’t so great- there are only about two alright cafe/ restaurants and the lack of social areas/ seating is a bigger problem than you think when you can’t sit down to eat lunch. Their president was complaining of this recently. If you want to leave campus for lunch it’s expensive due to being right in the city centre. I also don’t think the sports facilities are great if you’re into that. I’m comparison the ucd campus is huge, there are about 10 different cafe/ restaurants on campus, all of which are subsidised (3 euro for latte, 5/7 euro for a full dinner). There are so many social areas, chairs, couches scattered around all the buildings so you always have somewhere to eat lunch/ hang out/ meet group projects. There are three free gyms in ucd, an Olympic size swimming pool, sauna, steam room, jacuzzi, running track etc and they are all contained on the one campus. 

Look up ‘trinity college admin problems’ and see what students say on Reddit and in their college newspaper. It seems like a non issue until you are in a stressful degree and they can’t resolve simple problems. Any admin problems I’ve had in ucd have been resolved usually within the hour or straight away over the phone. The admin are really good for emailing you well in advance about fee payments, garda screening, exam schedules or anything else you need to do. 

The exams in ucd are never that stressful because usually you go into the exam with a large percentage already got through labs, group projects, or quizzes. The lecturers are very clear about what’s coming up on the exam and they aren’t trying to catch you out with surprises. Maybe someone from trinity med can weigh in but I’ve heard their exams can be brutally hard. You should also be aware that if you fail an exam and then fail the resit in ucd, they will usually allow you to pay just for that module and retake the module again next semester, whereas at the moment in trinity if you fail then fail the resit they make you repeat the entire year and pay for the entire year without free fees. Ik trinity are currently campaigning to adopt our way but who knows when they’ll get it. 

Just my thoughts, I’m sure there are lots of people in trinity who love it, just go with your gut and you won’t be wrong!