I think I like the Pearce extension better than the NDZ for my hand shape and size. The Pearce has a more moderate pinky ledge, and the NDZ makes my hand feel a little cramped in comparison. I have fingers like bratwursts, so this may or may not reflect your experience.
Another nice thing about the Pearce is that it fills in the gap between the bottom of the frame and the magazine floor plate better than both the factory baseplate and the NDZ. That, and being polymer it's not cold.
The NDZ is made incredibly well, though! Choice is good, try them both and decide for yourself.