Styles of "Salsa"
The original salsa style, as considered by most, which has been developing in Cuba since the 1950s. Cuban-style salsa can be danced either “on one” or “a contratiempo” – the latter is often referred to as “on two”. An essential element is the “cuba step” (also known as Guapea), where the leader does a backward basic on 1-2-3 and a forward basic on 5-6-7. The follower does the same, thereby mirroring the leader’s movement.
This style is common in Latin American countries. The leader and follower do most of the movements while standing in place. It stems from the Cuban style.
Los Angeles (L.A) style
Developed in recent years, this is a style of salsa much effected by Hollywood and by the swing and mambo dances, thus being the most flashy style, which is considered “more show than dance” by many.
Eddie Torres style
The “NY Style” is a combination of the “On 1” and “On 2” systems. The timing of the steps are on the 1-2-3, 5-6-7 as in “On 1” but the breaks (where the body changes direction) occur on the 2 and 6 as in “On 2”. NY instructor Eddie Torres developed this step pattern around the late 70s and the 80s.
This style is similar to Los-Angeles style, but it is danced “On Two”. The basic step timing is 2-3-4, 6-7-8 with the breaks on 2 and 6.
Puerto Rican style
This style can be danced as “On One” or “On Two”. If danced as “On Two", it is always danced on count 2 and not on count 6 as in Ladies-style NY.
Online source: https://www.worldsalsachampionships.com/history.htm