I have to disagree with the bolded. My hair looking nothing like yours means nothing because We might have the same porosity and density issues,
I use products by ingredients not hair type. I use products geared for straight, kinky , coarse ,dense, white, black , indian... etc
With product, moisture, and the of health of my hair can look like a 3c and on a bad day this so called 4c
what it all boils down for me is the health of my hair not some type classification that some man come up with who doesnt even know how to style kinky hair other than straightening it or slapping a relaxer on it.