Do a forum search on this subject for a lot of info.
If you are talking about flat water speed, then.........
Light wind (5-12 knots) - freeride will be faster
Moderate wind (10-22 knots) - about the same
High winds (20-30 knots) -cam will be faster. However, with wind this strong, few will be on cam sails except slalom, speed or formula racers. Most will be on no cam sails because speed isn't an issue and they want light, easy to handle sails that gybe well.
Generally, more power with the freeride sails and more stability and range with the cam sails.
Formula 160; iSonic 111; HiFly Move 105; Tiga 263; '85 Mistral Superlight.
Maui Sails TR 11.0; 9.2; 8.4; 7.6; 6.6; Maui Sails Switch 6.0; 5.2; Maui Sails Global 4.5; 4.0.