Too bad projectfarm didn't test the Facoms, that's the only brand that seems to be doing something totally unique with the design (in a typically French fashion

).
I'd probably buy the Eagle grips if they were available in EU, but to pay that price plus shipping plus import tax and maybe even customs, I could buy a ton of pretty good quality European pliers. For example the Facoms are 40-55€ for the usual shapes and sizes (more pricey for unusual or very large designs). And they do offer stuff other such pliers do not (a lot of capacity and clearance, totally different than most such pliers...).
Interesting to see Eagle grips next to the Knipex. I can see the pin position between them are quite different between eachother and also quite different relative to the jaw position. This arrangement must have some impact on the mechanism (maybe one of them are designed to release easier? Or maybe one pair offers a little bit more gripping force, or maybe one open a bit more...).