Manual of arms for Omega decocker is similar to other common pistols, especially Sigs. Owning both CZs and classic Sigs, I prefer the Omega setup.
I am not aware of any modern and common firearm decocker that's analogous to the classic CZ decocker's location. Cz52s' decocker was similar. There might be others, but not recalling offhand...
Berettas might be the closest to that far rear, but they're slide mounted and otherwise still quite different. Several decockers are like Berettas as well -- Bersa, Ruger, Walther, etc.
FN's modern hammer fired decockers are fairly rear as well. H+K's looks similar but is further forward.
As said above, size the pistol to your hand first and worry about decocker location later. Activating any decocker with your shooting thumb breaks your grip.