There are many characteristics that identify salsa styles. There may be different step patterns, different timing of steps, particular movement on the dance floor (eg:slot, circular), dancer preference of turns and moves, attitude and others. The presence of one or more of particular elements does not necessarily define a particular style. For example, many salsa styles can be danced "On One" or one style may be danced "On One" or "On Two". The following are brief descriptions of major "recognizable" salsa styles.
Cuban Style
The original of the Salsa styles, as considered by most, which has been developing in Cuba since the 1950's. 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. Another characteristic of this style is that in many patterns the leader and follower circle around each other.
The cross body lead is an essential step in this style too and is referred to as Dile que no. This move becomes essential in the more complex derivative of Cuban Casino leading to the many moves of Rueda, or wheel dance. Here multiple couples exchange partners and carry out moves syncronised by a caller.
Columbian Style
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. As such in many patterns the leader and follower turn around each other, although not as much as in the cuban style; in fact, in several parts of Colombia, salsa is danced with very limited or no turns at all.
Los Angeles Style
Developed in recent years (some say between 1999 and 2002), this is one of the salsa styles much effected by Hollywood and by the swing & mambo dances, thus being the most flashy style, which is considered "more show than dance" by many. The two essential elements of this dance are the forward/backward basic as described above, and the cross-body lead. In this pattern, the leader steps forward on 1, steps to the right on 2-3 while turning 90 degrees counter-clockwise (facing to the left). The follower then steps forward on 5-6, and turns on 7-8, while the leader makes another 90 degrees counter-clockwise. After these 8 counts, the leader and follower have exchanged their positions. The Vazquez brothers are widely credited with developing the LA style of salsa. Luis taught in LA until 2005 when he and his dance Partner Melissa Fernandez moved to Lugano, Switzerland. Here is a link to his bio: http://www.massalsabrava.com/bio.php His Brother Johnny moved to Valencia, Spain in 2002, together with his dance group Imperio Azteca. http://www.johnnyvazquez.com Both brothers decided to move to Europe because of business aspects. Nowadays, the market to sell their style of salsa in Europe is much bigger than in America. Almost every other weekend of the year there is a Salsa Congress somewhere in Europe.
New York style or 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 70's and the 80's and its definition is quite clear since he is still alive and his followers are keen to keep the style intact. This is their description of the step: Description of "On Two" on salsanewyork.com There are many "socials" in NYC or nightclubs that dedicate on playing only mambo or salsa.
Power 2 / Palladium 2 / Ballroom Mambo
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.
It is important to note that although this style is also known as dancing "En Clave", the name is not implying that the step timing should follow the rhythm of the Clave as in 2-3 or 3-2. It only means that you take the first step (and break) on the second beat of the measure.
On Clave
This does indeed follow the 2-3 or 3-2 pattern of the clave, e.g. for the 2-3 clave the leader steps forward with the left on 2 and with the right on 3, then does the other 4 steps of the basic on 5-8 (syncronizing with the clave on 5 and 8). It's a traditional form and it's less known/used outside some latin countries.
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. There is a Salsa Congress in Puerto Rico where salsa groups all around the world attend and perform.