Northumbria’s ranked 38th whilst UWE is 54th so in all honesty there’s not really much difference between the 2 in terms of academic reputation and employers won’t really have any preferences of one over the other. Social life wise both are really good with one located in Bristol and the other Newcastle which are both great cities for students. The one key difference is Newcastle is wayyy more affordable than Bristol with the latter being similar to London when it comes to cost of living. That may be a factor which is important to you but if you have good financial support then obviously maybe don’t worry about it as much. I’d really recommend visiting both cities/going to the unis to get a proper feel for yourself and see what suits your interests.