Board Thread:The Flash discussions/@comment-13895380-20170427131354/@comment-24152851-20170502035238

Speed Force empowered Savitar was impossibly fast, but once released he's only slightly faster than Barry.

Legends Eobard feels really OP, who completely mops the floor with the Legends, while Wellsobard got took down by Oliver (let's be honest, Oliver did all the work in that battle while Barry and Ronnie just finished off a weakened RF). This was before Barry got the massive speed boost from being in the Speed Force. After which he became faster than Zoom. Sara explicitly stated that Legends RF was faster than the Flash. Though I guess it's possible she was referring to Barry back from season 2.

But tbh, Savitar heavily relied on his Speed Force buff and the Philospher Stone. Once he's on his own, he isn't that impressive and Barry got his hands on him. Eobard is an extremely experienced Speedster and uses his powers more creatively.

We can't use Black Flash unless he fights Savitar. Because the Speed Force didn't want to kill Barry.