When we build our Dacron Offshore
Plus voyaging sails
we favor Challenge Marblehead for low aspect sails
and Challenge's Fiber104 or high aspect cloth for high aspect sails.
Vectran has a lot going for it and there are some good choices in a variety of materials that use Vectran. There are drawbacks to laminates for extended cruising
as they can be difficult to get repaired in the third world.
There is no magic bullet product. Each one has pluses and minuses. Read the cloth manufacturers websites. There's some good info there. A good sailmaker
will spend as much time as you need to arrive at the best choice for your application.
Most sails these days are built overseas. One production loft, that Practical Sailor referred to as the "800 pound gorilla of modern sailmaking" produces for many of the big brand names as well as for smaller independents like us. Many of the high tech sails are made there and marketed under different names. It's become a highly globalized industry and technology has leveled the playing field.
Look past the labels and ask specific questions about how the sail is built. Compare specifications closely. Get past hype and into the facts the best you can.