The baby squid is just that, a baby variant of squid, that's like saying different colours of shulkers are different mobs.
They also aren't on Java, which is the version I play the most (I rarely play bedrock)
If Dream (aka: speedrunner boi that allways rigs votes and would rig this update's by voting the copper golem but too many ppl voted the allay) wouldnt have rigged it we would have the illusioner in mc rn (or maybe the mooshroom)