I want to play a game. (re-read that part with Zodiac’s voice in mind, you know, that guy from the movie Saw)
The game is called – spot the difference! So let’s get straight to the point – hint: It’s no hollow tubes variant!
If you were able to spot the difference you are good at telling variants apart. The left one has dark brown straps, while the right one has light brown straps. See below for close-ups (dark brown straps first, light brown straps seconds).