[npunt]

Take Geekbench for what it's worth, but the absolute fastest of the old cheesegrater Mac Pro's (dual 6core X5675) are just 56% the speed of a A12X single-core, and only about 40% faster multi-core. The next iPad Pro's A13X will probably get close to evening the playing field on multi-core.

It's really only the memory capacity that the Mac Pro's have an undisputed advantage on (4-6GB vs up to 128GB). Memory bandwidth is way faster (33GB/s vs 19GB/s) on A12X owing to LPDDR4 vs DDR3.

The latest iPad Pros are beneficiaries of a decade of intense R&D from the most profitable product in the world (iPhone). Form-factor aside, the chips themselves are stupid fast.

http://browser.geekbench.com/v4/cpu/13281048

https://browser.geekbench.com/v4/cpu/11468644