Thomas Smet
Veteran
My guess is that noise levels is the main differentiation. The BMD design is custom with a huge heatsink to be more or less silent. More generic solutions simply offer a box around a retail card. Yes, they're cheaper, but not as refined. Buyer's choice—which is good.
My Mac Pro from 2009 scores 24500 in multithreaded. I guess the listed Macs are the stock configs, whereas most old towers still in use for demanding tasks likely all have the 3.46GHz CPUs that cost nothing.
I don't say this to take anything away from the new MBP though: it seems like a really cool allrounder straddling the portability vs power gap quite well. And let's not talk single threaded scenarios at all, please.:embarasse
That 2009 Mac Pro also is missing a lot of the hardware instructions that speed up tasks vs just the brute force strength. Its part of the reason why some h264 based tasks are faster on the regular iMac vs the iMac Pro which uses Xeon CPUs that are typically a generation or two behind in hardware instructions. Some tasks may be as fast but some will greatly suffer on an older machine.
My 2015 MBP is that way vs my iMac from 2012. On paper and in raw 3D rendering the iMac blows away the 2015 MBP but when running FCPX the 2015 MBP with is much lower clock speed completely destroys the 2012 iMac.