It depends on what you buy in both places. I have some great BR pieces and some great J. Crew pieces. At J. Crew, you can probably walk in and find something good without any problem, but at the same time, there are a few items I don't find very "age-appropriate" for me. At BR, you just have to be a lot more careful and selective. I've found great stuff on clearance that, while it may not beat j. crew in terms of style, is certainly serviceable in terms of fit and look.
I have a great BR short-zip jacket that I love; a great pea coat, slim and modern-looking; same with a blazer, some cashmere v-neck sweaters, and a few dress shirts (plain, not the bold striped kind every SF member complains about). And while their khakis aren't the slimmest I've ever owned, they are inoffensive, well-made, durable, and comfortable.