it might be rude if you gesture towards the tag and do a couple quick eyebrow raises
or if you see him/her look at the price and you let out a low slow mmmmhmmm or a "cowabunga bruh"
I find myself gravitating to one brand per clothing category (knits, denim, sneakers, etc.). When I own something from a maker not on "the list," even if it's nicer than my other stuff, it bothers me like crazy. Weird form of OCD, I guess. I do the same outside clothing in a few areas (computers and luggage come to mind).
nice meeting you, and glad to hear you liked it! Did you go with the Bronte burger? Those australians do things sort of weird, but I like it. Just can't go in expecting the texture or taste of a normal patty.