Uniformity

[Agin]

This also seems to support the notion that some of us think the Romans had "Regional" styles. Germanic troops (via tombstones) seem to be slightly different from Egypt, from Britain, etc. (and, even T-C, or something like the Adamklissi monument)

I wonder how much admixture of the regional styles there may have been. For example, during the Iceni Revolt, Legions like XIIII GMV were brought from elsewhere to aid. I'm sure they would use the same equipment they had been while stationed in Germania, especially with the (relatively) similar climates.
Andy, you mentioned that III Cyrenaica moved to Syria from Egypt, and the coats they ordered were sent to Syria from Egypt. Of course, there's no way to know 100%, but, perhaps they had taken a liking to the style, and 55 legionaries put in for them, or 55 needed to be replaced, or perhaps they wished to introduce the style to Syria. I believe it's no coincidence that it was sent from the same province they had, until recently been stationed. Although, on the flipside, if I'm not mistaken, would Egypt not be the the place to go for cotton? It also could have been that they needed cotton coats, or wanted them because they were cheaper...would the cost of shipping them outweigh the price of linen?