They look different from the Toolalla lined dogs here and they look different from Rue as well, but I don't really think Avalon's dogs look like Border Collies. And they definitely do not act like Border Collies. So while some people might think they look similar, that's where the resemblance stops. They did remind my mom and I a little bit of ACDs in looks here and there depending on the angle/what they were doing, but again, they didn't act like an ACD. Well, I shouldn't say 'they'. Mainly just her girl reminded us of one. Movement wise they were much more upright (kind of pranced actually) though, loose eyed and while seriously focused on the game they were playing, they also came across rather goofy and just all around fun-loving. And suuuuper cuddly and friendly with people they just met. Based on how C/Koolies were described to me by a bunch of different people with dogs from all different lines before I met two, they pretty well behaved/acted as I expected and certainly came across as all Coolie to me.
C/Koolies vary a ton in looks, as was said, but that doesn't make them any less C/Koolie. When I was looking I came across some that reminded me of huge Cattledogs and honestly are not aesthetically pleasing dogs at all to me (they were very blocky/stocky and like 50lbs+), some that were small and stockier with a short but thick double coat (like Avalon's), some that were finer boned and short coated (not smooth, but lacking a thick undercoat) and smaller (like the Toolalla dogs on Chaz and Rue), some that had flopped/rose ears, some with prick ears, long haired ones, slightly different head shapes etc. Different lines have different looks to them, seemingly based on their region and also the breeder's preferences. But along with such variety, I could still tell that the vast majority were undoubtedly C/Koolies, and even with the variety, many breeders do have similar looking dogs, whether lines are shared or not.