Don't think of it in terms of quality. Unless your only measure of quality is how light something can be. The frames are likely constructed to withstand the same forces of rider weight and resistance to damage from normal and not so normal use as any other.

The better and more expensive carbon cloth and resin just allows the bike to have a lower weight in most cases because less of it has to be used. And probably any differences in stiffness are just something that can't be well controlled between the two types of carbon. Similar to how different types of steel tubes gave some vintage bikes a different ride than previous years models with a different alloy of steel.