Essentially, yes. It's all of those things. Well, not really stronger. It's a much lighter fabric, so it doesn't deal nearly as well with abrasion and punctures, so more care is needed with it. But, it's a good way to save a few ounces in a tarp. And good quality spinnaker is more waterproof than sil nylon, so you'll get less of the misting in a heavy rain. There's a couple tarptents out there now made of it... the Squall Classic is the one I've seen in person, and it kinda rocks... I want one.