I assume from the two schools that you want to work in critical theory/critical race and pos-colonial theory for which both schools obv have many people you can work with. They are very comparable places as far as theory but maybe UCLA is a tad better, However although within the subfield they are quite similar, I think you should also look at overall departmental philosophy toward Theory. I know that UCLA and UCSD both focus so much on quant methods and core training that some theorists complain that they really cant delve into the material as much as they would like while they are taking coursework so that a PhD takes more than 6 years to complete simply because they dont have as strong foundation as they would like (and you would get at a more qual dept such as Northwestern). So my advice is to see which dept as a whole is more congenial to the study of theory and this prob goes to your personal impression. If you find the two dept to be on par on this point, then I would go to UCLA because it has a better location, weather, etc and you are gonna be stuck with your decision for the next 5-7 years.
Good luck!