Which is faster? Mac mini 2012 vs. classic Mac Pro 2012, Encoding HD 1080 h264 comparison

Encoding a 60min. HD ProRes422 to HD h264 (Best/MultiPass Quality) file on cMP (6 cores Xeon), and on Mac Mini (quad core i7)

1) Using Compressor:

1a) cMP = 210min. Abysmal!

VTEncoder almost never goes over 400% CPU

Using only 6 cores at 70% and 6 cores at 10%. Total never goes over 40% User CPU load.


1b) Mini = 50min. Best results!

VTEncoder barely goes over 200% CPU

Using only 4 cores at 10% and 4 cores at 5%. Total never goes over 40% User CPU load.

2) Using Adobe Media Encoder:

2a) cMP = 90min. Meh.

AMEncoder goes up 750% CPU

Using 6 cores at 80% and 6 cores at 60%. Total goes over 65% User CPU

2b) Mini = 84min. Meh.

AMEncoder goes up 600% CPU

Using 4 cores at 80% and 6 cores at 60%. Total goes over 65% User CPU

3) Machines configs:

cMP 2012 6 cores 3.46GHz, 32GB Ram, Radeon 7950 3GB.

Mini 2012 4 cores i7 2.3GHz (Turbo Boost up to 3.3GHz), Intel 4000 1.5GB

Conclusion: Even though its specs are underwhelming compared to the cMP, the Mini wins with Compressor.

The cMP is really terrible! (x4 real time!!! What?) The Mini encodes the 60min. file in less than 50min. - under real time. 

On the other end with AME (which is much more power hungry) it's about the same on both machines and it takes longer than real time (x1.5 real time more or less.)

The Mini sports a dedicated h264 encode/decode chip, makes sense that the performance is better, it seems though only Compressor is accessing this added power. Adobe? What the heck??

Have a good day!