Hi there,
It's a tough decision to make and one I went through myself! I did take a gap year so had the benefit of unconditional offers which alleviated some of the concerns you're facing. I went to a Nottingham Open Day before realising that Exeter was an option for me and really enjoyed it- the staff seemed really supportive and encouraging and the whole experience was great; I felt like I would easily fit in. I eventually decided that Exeter would offer me a better course with more flexibility and more focus on the things I really wanted to do, but that's a personal thing and I would have had no qualms about going to Nottingham at all.
I'm now halfway through my first year at Exeter studying Economics with French through the Flexible Combined Honours programme and absolutely love it. It's a lovely city (albeit more the friendly/quiet type, so it depends on what you're looking for!) and I've made some amazing friends and am thoroughly enjoying the student experience. I know they have a fantastic reputation for both English and Classics (and I have friends who study both), but honestly, the uni rankings aren't everything and Nottingham is still right up there anyway. It seems that both are interested in having you, so the question is, what do they have to offer you and what's going to be really important to you over the next few years? For me it was the course; a lot of the rest of it was looking forward to The Uni Experience, which I'm sure I would have enjoyed in a good variety of places (although it did take me a little while to realise that).
But at the end of the day, uni will be whatever you make of it, both are exceptionally good universities, so you can't really make a bad choice here. Ultimately, you'll do better wherever you're happiest, and although Exeter has modern facilities and a great reputation, if you know you'd be happier in Nottingham, go with the gut instinct.
Good luck!