I think we might be right back to cooling. The one used by anandtech has 1/2 the flow rate of the wraith.
Taking it one step farther, lost of sites only used the Wraith in testing Ryzen and used AIO's for 8700k testing. It's entirely possible that Anandtech is getting all its boosts properly on Ryzen with the wraith (which might be rare) and everyone else is getting the best boost performance out of their 8700k's?