Mike, I don't know.
In the 35+ years I've been handloading, I've never had any difficulty discerning a ball powder from a flake powder. The two just do not look anything close to the same to my eyes. Maybe it's because I'm blessed with 20/15 vision... maybe it's just that I know what I'm looking for to tell the difference, I don't know. But to me it is easy to discern even a severely flattened ball powder like Win231 and WST from an extruded flake powder (take your pick of any...) Ball powders, after flattening, have irregular sizes and shapes of the individual granules, where extruded flake powders (which are really no different than extruded tubular powders except for the fact that the tubes are sometimes larger diameter and cut VERY short to make the flakes) are uniformly round at the edges, although there may be some rippling effect probably from the coating process that some of the powders receive.
I'm eager to hear what Hodgdon has to say. I haven't loaded any Universal in a few years, I may have to go back in my reloading room and take a look at what I have. But, I'm quite sure it is an extruded flake powder, with an unusual light tan color... I'm guessing that it does not have much graphite coating to give the usual dark color.
**EDIT**
I had to go down and look at my Universal, which was purchased in early 1997... the label is "Universal Clays", before Hodgdon shortened the name to "Universal". It is a dark gray powder... so I looked at my bottle of regular "Clays"... it is the lighter colored powder I was thinking of, although it is darker than I remembered... but, it is 1993 vintage (26 years old, DANG IT I'M GETTING OLD!!), so maybe it has darkened with age. But, it still smells good.
Anyway, I will be surprised to learn that Universal is a ball type powder... sure looks like a small grained flake to me. Maybe the newer vintage is... but my old stuff sure looks like a flake powder.f
Be sure to share what Hodgdon has to say, I'm definitely interested!