Both Uni's a very good, Kingston is mainly white people, but there is a strong ACS group that can support you, area is nice cinema and malls are within walking distance and theres a free bus that can transfer you from campus ( from Penrhyn, if my memory serves me correctly) Halls of Reds is expensive £97 a week en suite

Brunel is nice university friendly etc has a high African population (uxbridge side esp) so you may feel more comfortable, there is still an ACS group as well, because its London Halls will be expensive too.

But yeah like MB said check out their sites, I'm sure its the uni's name and then ac.uk at the end...