Black twill supertop nx

Bestop and quadratec now list a black twill supertop NX on their websites. I assume its the same as the new OEM premium top material. I'm wondering if anyone has seen the new Supertops yet?

Bestop says the top includes 40-mil windows, YKK premium zippers, extended surface heat sealing, powder coated hardware, and 135 gauge thread. 

The implication is that these features are unique to the black twill model. I'm wondering if it's just maketing spin and the only real difference is the fabric.

Soft tops and Bikinis

It's currently a $580 price difference between the old sailcloth/black diamond model and the new black twill ($891 vs $1474). 

Wondering if its worth it. The black twill model has a lifetime warranty whereas the old model has two years. 

That alone isn't worth more than a 50% price difference in my opinion. Is the fabric really that much better? Are the windows any different?

I'd be running it in the summer only (hardtop in the winter), so cold weather performance isn't a factor for me. Thanks all.