I'm currently at UoN and I absolutely love it here, I don't know anyone studying at Manchester uni but I did go on the open day
With the campus I guess everyone has different preferences. The Nottingham campus is very open and green, not in the middle of the city like Manchester but one of my favourite things about living in Nottingham is the transport. From campus you can get the bus or tram in to town for only £1, the tram only takes 10 minutes, taxis are pretty cheap too. Also most people live in Lenton from second year onwards which is within walking distance of town
From what I saw of the two open days, Nottingham definitely had the nicer accommodation. I think the biggest downside of Notts accommodation is that the only halls actually on campus are catered, so if you want to go self-catered you'll have further to walk. Broadgate Park is the biggest self-catered accommodation site and it takes 20 minutes to walk from there to the Pharmacy school and there's no hills on that route. Broadgate is absolutely enormous so you're bound to find other Pharmacy students to walk with on a morning and the walk really doesn't feel like 20 mins at all
Plenty of night life and things to do in Notts. I can't compare placements because I've no idea what they do at Manchester, but don't get too hung up on placements that the uni offers, it looks a lot better to employers if you arrange your own placements in the holidays rather than filling your cv with 'I spent three days in a pharmacy that my uni made me go to'. As for rankings and reputation again I'm going to be bias but Nottingham does have a great reputation, I've worked with a lot of different pharmacists and whenever they hear I'm from Nottingham they usually say 'that's one of the best isn't it'. Students here seem to do really well with finding summer placements and jobs
Sorry I couldn't be more useful, but if you've got any questions at all just ask
Maybe try go on the open days again if you're really struggling to decide