Which DSLR Camera is better, a Nikon D90 or Nikon D5100?

If photography is just going to be a minor hobby, I would get a D5100 but if you plan on learning to use your camera manually or get some classes in photography, I would suggest getting the D90 because of its features that the other doesnt have, like faster 4.5 shots per sec, bracketing for HDR, support for older af lenses. and more