Google is failing me.  I need to clearly define the differences
between the following t-shirt qualities:

1) Carded Open End cotton
2) Carded Ringspun cotton
3) Combed Ringspun cotton
4) Combed Open End cotton (does this exist)

I see alot about how Combed Ringspun is stronger, smoother, more
durable, retains color etc.  but it is unclear which characteristics
are caused by the combing or the ringpun.  I need a brief, clear
explanation of the differences.