Well, I would say this comparison was just a waste of bandwidth. Besides the fact that it wasn't really a "shootout" I cannot imagine that the color uniformity issue is a general issue to this extent with the AW15 but likely to be specific to his unit which might be faulty / out-of-specs.
If you want to create a serious review, with such an issue you have to contact Sony first, discuss it and get a replacement unit to find out if it is normal quality tolerance or a faulty device. Unless you do this, you issue a general statement about a whole series which is derived from that one model that has most likely a quality control issue, i.e. the review is worthless.
Check the review of an AW15 pre-production unit (mid April) on cine4home.de. They haven't seen any color uniformity issue.