Overall it sounds like the AJA is a little more Pro, with the ability to record above ProRES HQ in ProRES 4444 (even with the URSA’s upgradeable sensor). Still with no viewfinder you either need a bigger investment or to already have rails and other gear to go with it.
And the worst thing of the Cion, other than not having a viewfinder of it’s own, is that is uses AJA created storage, unlike Blackmagic which uses off the shelf components. Of course hopefully you can then trust them more, but they will cost more.
He is right though, this looks to be the Canon/Nikon of the Videography set.