Not sure about those, but I've had phenomenal luck with shorts from Aerotech Designs (http://www.aerotechdesigns.com). My first pair I've had for almost 6 years and have been on my butt for several centuries, gravel centuries, and all kinds of long rides. And they were the cheapest ones they sell! They're starting to get a little thin, and approaching being too big for me so it will work itself out.

My two other pair are their "Top Shelf" bike shorts, and both pair are three or four years old, and both look like new.

I can't recommend them enough, someone else in this forum turned me on to them but yeah, I never have had a quality or comfort problem with them.