Eh I wouldnt consider them "the same" I mean look at vanillas and compare them to a jungle. Each line seems to have distinct traits that characterize them.
I could be wrong about Vanillas, I was under the impression they were a type of pastel, but they may be a distinct trait.
Anyway, Lemons, Blondes, Jungles, Zebras, etc. They all have that special something to them.