The difference is that:
For example with the Greasers:
G_Striker_A is peanut, Ricky, Lucky Fs
G_Meele_A is vance and lefty Fs
G_Grappler_A is Hal, Norton's fs
With the Preps:
P_Striker_A is Gord, Tad's fs
P_Striker_B is Parker, Justin's fs
P_Grappler_A is Bryce, Chad's fs
The Bullies only have B_Striker_A cuz thats the only style that they have, without talking about Boss styles.