Macworld has conducted some benchmarks on various Late 2012 Mac mini models

The $799 standard configuration Mac mini comes with a 2.3GHz quad-core Core i7 processor, 4GB of RAM, and a 5400-rpm 1TB hard drive. We customized it to include a 2.6GHz quad-core Core i7 processor (a $100 upgrade), 16GB of RAM (another $300), and a 1TB Fusion drive (a $250 upgrade). The BTO Mac mini is $1449, but it adds up to one of the fastest Macs the Macworld Lab has ever tested.

With a Speedmark 8 score of 249, the BTO Mac mini was 52 percent faster overall than the standard configuration $799 Mac mini. The super-charged mini was faster in our processor-intensive tests: 8 percent faster in MathematicaMark and 13 percent faster in Cinebench CPU test.

  Lab Tested: The Mac mini, maximized with Fusion Drive