It sounds like you're already answering your own question(s). Use the WEB to search for the key words like tyvek and barricade and housewrap and compare and so on. Go to Google.com Search Engine and enter in as many keywords (even in addition to the ones I entered) and see what 'hits' you get. If you can get unbiased info from 3rd parties, like a University, then you should be getting good information. This is what I'd do.
Just be prepared for the price increase if you go with the 'better wraps'. My best to ya and hope this helps.
Jay J -Moderator
PS: Be SURE you're looking at the SAME types of barriers. Moisture vs. Air could confuse your research ...