something like this:
Imperial in environment -> London (so more expensive), Halls only 1st year, Transport is expensive, Smaller rooms, Alot more things to do/see (city is much bigger), More Science oriented uni (so alot of things like gender bias change), Alot of facilities (like lib) are open longer
Soton -> Cheaper overall, Halls every year, Transport cheaper/included if you live in halls. Not much to do in the town, but alot of clubs/socs in uni (really, not much else), More rounded uni (humanities), Smaller/Less accessible facilities (ie smaller labs, open less), Houses are much easier to find near uni for 2nd yr if you need em.
and then i wanted to judge if Imperial is worth paying for