Factory soft tops are the diamond point fabric, which is actually a sort of sailcloth, but not as heavy as the replace-a-top sailcloth people are talking about here. If you want to match with our replacement stuff, it would be color code 35 (for black).
Is sailcloth better than factory material? I wouldn't say "better" necessarily. It's heavier and quieter. And more expensive.
We try to get these sample cloth books out to all the dealers, so someone in your area should have one. Or send me your address and I'll try to get some samples sent out. firstname.lastname@example.org