I honestly don't think 3c or 4c exists. That's my personal opinion. The way it is described, it's very clear what the distinctions are. I agree that we are all different, but honestly, 4b sounds like it doesn't have much of a coil but more of bends. So what is 4c? I don't think it exists.
I think 4c has no curlx defination at all thatx wat I,think