Their releases were very much intentional as they spanned from 1984-1985 and got rubsign updates. You can also find packaging variations which have a photo of a yellow Cliffjumper or red Bumblebee on them.
https://i.ibb.co/pfKXLNH/12140.jpghttps://i.ibb.co/x6zfphZ/bubblebee-t...86f3266f0d.jpg
In regards to whether they're unique characters. No I don't consider them unique characters, but they are unique toys. Like for instance we can have red and blue versions of POTP Swoop but they're still Swoop.
I'd be fine with this being retconned down the track though. For instance, I'd be happy if they brought over Stinger from the movieverse and make him red Bumblebee.