There are different styles of Salsa dance, namely L.A. style, Cuban, Miami and New York Salsa.
L. A. style is no doubt shaped in part by the fact that Los Angeles/Hollywood is all about acting, being flashy, and drawing attention to oneself. This style is fast, sharp, and eye-catching. It often includes what Salsa dancers call “tricks” (i.e. acrobatics).
New York style evolved in a city where many great Mambo dancers made their mark. Mambo is danced on beat two–which means that the dancers change the direction of their movement on the second beat of the musical phrase. So it is no surprise that many NY dancers dance “on two.”
Cuban style Salsa is the style that is most like the Salsa done in Cuba, where the dance has its roots. I have heard many say that this style is characterized by a sort of male dominance. (It does seem that some of the moves show off what the men can do.) Cuban style dancers don’t tend to do fast, multiple spins. In addition, the movement of the partners in this style tends to be circular as opposed to linear.
Miami style Salsa is dominated by the Casino Rueda moves that are popular there. These moves have been used and adapted by Miami dancers. The steps are “pretzelly;” with intricate, interconnected arm movements. In this style, too, the movement of the partners tends to be circular as opposed to linear.
Read more about these different styles here.