Board Thread:The Flash discussions/@comment-28354683-20160501172546/@comment-24152851-20170907012414

He was faster, but by a lesser margin than in season 1 which shows that Barry has improved. It might not be apparent, because if they look faster than the viewers won't be able to see the action anymore. But going by in-universe statements Barry has always been getting faster over time. In season 3 Julian drew up that graph showing at what rate Barry is increasing his speed and how he wouldn't be fast enough by the time Savitar killed Iris.

Ah, but you didn't consider that Barry got a huge speed boost after being in the Speed Force. That's why he was able to keep up with Zoom after he killed Henry Allen, because the Speed Force gave him an advantage. Even if Zoom doesn't look faster, the fact that he amped up on V8 and stole all of Barry's speed should have put him above Eobard.