Remember with the Mini they came in 4,8 and 16GB memory specifications and the memory cannot be increased. The Mac Pro can handle up to 32GB, has four hard drive bays, and the gfx cards can be upgraded heavily. Also GeekBench test scores, which of course are not the be alla nd end all just a good indication, show the Mac Pro returning over 14,000 and the i7 Mini just over 8,000 so I suggest you get the Mac Pro.