The Engadget "review" doesn't really provide any facts and they didn't run exhaustive tests on any of the batteries.

I do like the PowerGenix NiZn from the perspective of the higher voltage. Should work better in some finicky devices that monitor the voltage and turn off when it low enough. NiMH are 1.2v and I can tell you they don't work well in my old Garmin eTrex for instance.