But then, I have been “in the biz” for a bit too long. He asked me which one would be able to play HD video at full frame rate. The only appreciable technical difference is the extra 0.3 GHz and the choice came down to those 2. The difference between the latter 2 is US$100. Then there are 2 Core i7 models: 2.3 GHz and 2.6 GHz. At the time of this writing, there are 3 desktop models (and 2 more “server” models). I have a friend who was considering purchasing a Mac Mini recently.