Since both generally sell for MSRP anyway, (unless what you want is on sale) the only difference will be in customer service...before and after the sale.
The BB here is pretty crappy BEFORE the sale, I suspect they wouldn't be any better AFTER...
Fortunately, I have lots of options locally that allow me to skip BOTH stores for major purchases, and NewEgg takes care of my computer related needs VERY well...About the only time I shop BB or CC is if they have some kind of little thing (game or small hardware item) on sale, and I don't want to wait for NewEgg to ship...