I`ve got both.
The Ettore is small but very hard wearing (watch your hands
). And is the only real double pouch; meaning using both sections comfortably. The others tend to have a strip of material separating the pouch and this is stitched to the top, hindering easy access to the second section. It might be ok for storing something but not a cloth you want at hand, regularly.
This is a downside of the Unger, which is big
;but it`s ok, quite tough and can be used with an ordinary belt.
It depends what you want really but don`t be fooled by the claims of some double section ones.