A 6 puck disc is more of a racing disc.....It will hold more power and grab harder at the track. If you plan on using slicks a 6 puck will be better.....A 6 puck will wear out faster because it is a much more agressive material. Just like a soft tire compound that sticks better, it also wears out faster. 6 Pucks also will tend to chatter a little because of their grabby agressive nature. A street disc is organic material like a stock disc is...it will last longer, engage smoother and will hold power well once engaged.....The only drawback is the material in the disc will tend to tear and glase easier if you launch at high RPM's.