So the iMac Pro was unveiled yesterday, and now I'm a bit confused. The official headline reads "the most powerful Mac ever". The specifications are formidable. 18 cores, up to 4.5GHz, 128gigs of RAM(?) and a new Radeon GPU that has its' own name. So is it really the most powerful Mac ever, going up against a maxed out Mac Pro? And another question on my mind, is if I bought a top of the line iMac Pro and a decent Mac Pro with 18 cores, 128 gigs of memory and a comparable Radeon GPU, which machine would cost more?