The stickers on jokers for red orange and gold are all way too similar to each other under the reflective effect/movement, and it makes it hard to tell at a glance in my collection which jokers have which stickers. Considering the only utility of the stickers is to try and collect more, this kind of breaks that one functionality. At a minimum they could have different edge patterns (they all currently use the 4 black 4 white stripes), but I think they need entire color reworks, and potentially moving the reflective effect to only apply on Gold stickers.
This screenshot has 1 of each, and I think if you didn't know exactly what to look for you wouldn't even realize they're different colors.