>>16010678Skarmory has an arguably better defensive typing, Stealth Rocks, better defense, Whirlwind, Roost, Defog, Taunt, Spikes, and Brave Bird. Klefki gets Spikes too, Thunder Wave, Dual Screens, and Prankster to make them all go first, but it isn't very bulky defensively.
Skarm is better in stall though, but without Stealth Rocks and Taunt, he's not exactly a good suicide spiker yet, and he can't recover, bulk hits, and phaze like Skarmory can, so it's not good in stall teams.
Klefki is more like OU's Froslass if anything, although it can't Taunt or spinblock.