I was in a similiar situation last year to you about choosing between Loughborough and Nottingham for Engineering. (Currently i'm on an industry placement, and I'm starting at Nottingham in September but I'll try to give you as much help as I can!)
First of all, both Nottingham and Loughborough are highly respected univesities for Engineering. They both have great facilites, research teams, links with Industry and employement prospects. On some subjects, Loughborough may be more highly ranked but for Engineering they're about the same.
Because of this the main deciding factor for me was the campus and location. I fell in love with the green park campus at Nottingham, and the city is really great for things to do in the day. The buildings and accomodation looked really great, and I generally preferred them to Loughborough.
So what you should consider is the location. Loughborough is a smaller town, where Nottingham is a busy and lively city. Don't get me wrong, there is plenty to do in Loughborough with Nottingham and Leicester only short train rides away, but Nottingham is a city.
On the other hand though, Loughborough is a very good sporting university. This wasn't a factor for me as I don't play any sports, but if you do you might consider looking at Loughborough.
So what you're looking at really is do you want to large green campus with a busy city on your doorstep, or a good sporting experience with a slightly quieter town but several large cities nearby?
I hope this has helped somewhat!
Also, may I ask which Engineering courses you're looking at for each uni? I'm starting Product Design and Manufacture at Notts, and got similiar offers to you.