Inside step is faster and better. If you are doing a showcase and are being gunned you can go with crow hop just for a little extra velocity but make sure you are creating a forward vector before you let go of the ball. In real baseball, touch to tag time is king. The faster you get rid of it, the better, regardless of velocity most of the time. The OF coach at Stanford is our travel coach and this is one of his huge points of emphasis. Of course this was in direct conflict of HS varsity coaches teachings. My son stood his ground and didnt change to the HS taught technique. HS coach got a little PO'ed until he watched Andrew McCutcheon use the exact same footwork on a televised game that night. The next day coach told my son he could keep using his footwork with the inside step. You actually are fielding off of opposite foot compared to crow hop technique as well, so there is a learning curve, but a stopwatch doesnt lie.