Between the benefits, the constraints, and the price of Apple's top "Pro"-level machines, the MacBook Pro gives the iMac Pro a a solid fight for the crown of Apple's best machine. AppleInsider looks at how close the battle is — and how an eGPU could be the deciding factor.

It's been a long time since Steve Jobs outlined Apple's plan to have clear differences between its portables and desktops, plus its consumer and its professional users. Even so, at first glance a professional user with a demanding job is likely to ignore a MacBook Pro and presume the iMac Pro is needed.