If you are talking about reaction time of the pitcher to "defend" themselves or the reaction time of the batter to swing then they are comprabale. I am not arguing that, I am contending that EVERYTHING else being equal a baseball his going to have more velocity coming off the bat.
But a baseball also travels farther when it is hit. The fielders are also further out than on a smaller softball diamond. It may have move velocity coming off the bat, but by the time it reaches 2nd base it's roughly the same. And remember- softball is played exclusively with metal bats.