I would say that the rate of appreciation over all on detached housing is better but you would also have to factor in on both accounts the area that you want to buy in and also the subdivision. You would also have to ask yourself what you want to achieve. Are you going to live in this or is this an investment property?
With that answer, there are many more questions you would need to ask to determine what type of property would best suit your needs.
I would be glad to help you as I was an investor before becoming a real estate agent. I also own two condos in Raleigh. A couple of books that have helped me in the last year are The Millionaire Real Estate Investor and The Flip Book by Gary Keller.