Chapel Hill has become more diverse over time. Last census put us with almost 12% Asian. I don't know what percent is African-American or Hispanic, though not very high. Durham is far more diverse in that each race has the full economic spectrum also.
I live in Chapel Hill, work the Durham area as well as Chapel Hill and find that both are convenient so that I get the advantage of both. If you want more specific info, give me a call.
It is true that housing is less expensive in Durham. Again, figure out what is important to you in a community or neighborhood and definitely drive around. This is not a particularly urban area though downtown and other pockets of areas are urban.
I lived in Boston, miss the walkability of Boston, and wouldn't move back for anything. Love the lifestyle, friendliness and ease of living.
Vivian Olkin, aka CrazyViv