So I just got off the phone with a convertible top manufacturer (not sure if I can say the name even though there's no competing sponsor...) and had a custom top made in Haartz's new-ish Forte Twill fabric. It was released in 2014, up until that point our cars either had the Haartz pinpoint vinyl or the Haartz stayfast.
From Haartz's website and other sources I've talked to, this new material is a fair bit more durable and the backing is different than the cotton in the Stayfast, so acoustic improvement is had with the Forte Twill.
Best part? It was surprisingly cheap to have the top made in the 2-piece factory style form with a glass window w/ defroster (cheaper than many other kits I've seen using a lesser material or with plastic windows!)
If you have any plans to replace your top in the next year or two, CHECK THIS STUFF OUT. It's a subtle aspect that no one considers when upgrading, don't be that guy! And sorry if I sound like a walking sales advert
Just want to raise awareness!