The Aqux uses a fairly heavy fabric. Shouldnt be too transparent.
Expect the Adidas to give you full butt crack coverage...can be worn in any situation. The Aqux is designed to show about an inch of butt crack, if sized correctly at the waist..thats part of the skimpy Asian look and if a guy thinks he is uncomfortable with that the Aqux is probably not the right choice. The photos here provide a pretty good indication of the actual coverage in the rear.
http://www.aliexpress.com/item/Aqux-...638014927.html
If you want more coverage in back, you could size up to a Large