Yes, Steph. On the blue one the ox appears to dive deep and surface again elsewhere. On the Milky it just ends, no diving. And in the collage, that 3rd marble has tan flame like pattern long and thin. These couple of streamers in tan are seen on occasion in alley. These are in this case edged in ox, something else you see often in alley, the thin lines of ox following pattern. Of course with all the argument I get to the contrary they are still just my thoughts of things I think I see. In the collage the base of that marble looks very white and not so translucent, but I know the milkies do vary so that is just an addition and not a defining characteristic. So far the one in the collage is staying there, I question it sometimes and other times I do not. But the blue one I see as different.
Super, again the base is really white for a milkie but I would be more likely that than alley. The ends of the ox are more Akro like. Don't get me wrong, they are supposed to be white, just sometimes the look more stark white. =}