They are all produced by different manufacturers with different requirements for their cards. With most the GPU core is overclocked to one extent or another, and a few have overclocked memory too.
There is no one "best" choice. Pick one that goes with your system, your style/preferences, and your budget.
You have reference designs(those are louder, hotter, slower) and non-reference with aftermarket coolers like G1 gaming, g1 extreme gaming from gigabyte, Asus strix, asus poseidon, evga scx, galax Hall Of fame, hybrid cards(water+air) and those are always faster, quieter and cooler and more head room for OC.
They are all produced by different manufacturers with different requirements for their cards. With most the GPU core is overclocked to one extent or another, and a few have overclocked memory too.
There is no one "best" choice. Pick one that goes with your system, your style/preferences, and your budget.