Sellers assume, maybe correctly so, that most of us can't tell the difference between a fino, sub-fino, super-fino, super-mega-ultra-fino-fino, etc.; so they just throw those terms around all over. It's great seeing something labeled "super fino" when you can tell even from the (blurry) photos that it has about 20 wpi... in fact it might have even been woven with those big bendy straws...
I can't tell the difference between any of those. AFAIK, those terms are as varying and unreliable as Xs.