Here is some comparson photos with Duck bill and ambi Egro.
Duck bill and Textured Battlegrip
Ambi Egro and Battlegrip
Personally I always find the Hogue grip and the fobus grip or any style grip with finger groove and thumb rest to be a big minus when it is installed on a fast reaction rifle. the thumb rest will hinder any weak side transition and the finger groove are usually tough on grip change and transition from hand to hand under stress.
The new Tangodown grips are the best grip I have used so far. Duckbill used to be my favotite, but the battlegrip with the battery compartment, and a nicer palm swell sure makes a difference. I did not think the texture was a big deal, at least not until I laid my hands on them, it is definitely a big plus to the design.