Greenmonsters
Wannabe Duck Boat Owner
had my daughter hit balls off the tee using a rocketech and a CF4 insane. then i measured the exit speeds using my radar gun. the insane had slightly greater exit speed. the insane is also much easier to swing and causes fewer mishits. the insane is unique in that it swings like an end-loaded bat, but it's a -10 drop weight.
bottom line. the cf4 insane is a winner.
Bats will perform differently at different swing speeds. As mentioned frequently here, there is no one bat that is perfect for everyone. Best bet is to do what you did and try them out side by side to decide what works best for your DD.