Not to come out over-defensive, but your base configuration (I guess?) doesn't include a GPU, I bet your caches are significantly smaller, and also no ECC ram. I also bet your storage is considerably slower.
No that price included a RTX2080 which is a pretty decent card and better than the base config in the new Mac Pro.
Platform supports ECC all Ryzens do, though it’s on the board vendors to support it officially.
Cache size no idea, will not that the new 3900X would obliterate the sky lake Xeon (12 cores vs 8 and comparable or better IPC) on in the Mac Pro base confit, it’s an 8 core older architecture against AMD’s new best consumer processor and its 499 vs intels neatest equiv at 1100, it’s not even remotely close at the moment.
My point was that ECC ram is twice as expensive. Cache is super expensive (your consumer chip will have significantly less), so are PCI lanes (again, consumer chips have significantly fewer of these), and also your Ryzen chip doesn't have AVX-512 support which is important for e.g. video work.
