Making a comparison between the two isn't fair. Has Jolteon ever been close to suspect? Jolteon faces the danger of running afoul of Dugtrio with its Choice set, takes full Spikes and Stealth Rock damage, doesn't have Regenerator to mitigate passive damage and Life Orb recoil, and unlike Tornadus its coverage for bypassing resists is Hidden Power. 100% accurate, yes, but only 70 base power. But seriously Regenerator is absolutely insane and comparing anything to Tornadus-T (the only offensive Pokemon, besides Mienshao who is currently UU for all that Regenerator's done, we've ever had with it) because they have similar offensive stats is missing the point.