Flo has greater content, special interviews/documentaries, and video access for any Flo event, which comes with a price for all access. Flo owns the rights to all the matches recorded for Flo events, which is why a yearly subscription gets you access to all matches with Flo events.
Track is free, unless you want video of match results. In this case, video rights are owned by the event host, which is why you pay for match videos for individual events.
I recently learned about the match video costs, so I figured I would share this info.