Definitely a real heavy fabric compared to Clam or Frabill Brian. I have a, basically new, PE-1 (one man) in the hangar if you're interested.
As for Clam / Frabill Al... tamato.. tomato... Both have about the same density fabric. I like the way my Frabil sits as a wind break and I can put various center poles in to make it overhang as a rain/snow shelter roof, yet still have it open to the elements. Terry and Lloyd's clams don't seem to do this.. but maybe they just don't bring the poles or bother to set them up the way I like mine. The bigger Clams like the Yukon have a deeper tobogan than my Frabill Trekker. I think it just comes right down to the personal touches on what you like seat wise, colour, tobogan depth etc.