RR Job without a doubt. And IMHO if you could find an even better paying job take that. Best of all forget them both and just get on with flying.
Suppose depends on ultimate goal. If you really want to fly take the job with best cash/most flexibilty to get the training underway. If you're not sure if flying is you're goal then forge a career then see what happens. If you don't want to do anything else - borrow the money.
I did aero eng, finished and took a job in retail - better cash than BAe graduate scheme - just to fund flying. Problem was was travelling abroad too much to get any study done so packed the lot in and borrowed the money - couldn't wait any longer.
Yeah people will say have a backup - you have a degree, that'll do. Why waste more time?
Cheers
SK