The following are tendencies, some do have contrary examples, but by and large these are generally true.
Classical music can be from many different countries; flamenco is really just from Spain (although there are flamenco guitarists in many countries).
Flamenco is performed in song forms that are different from classical song forms.
Flamenco guitars are usually made of cypress and spruce, or cypress and cedar.
Classical guitars are usually made of rosewood and spruce, or rosewood and cedar.
These differences in choice of woods and in bracing patterns inside the guitar give each kind special sonic characteristics.
Classical guitars have a very large, rich sound from each note that really sings and can sustain for many seconds, an advantage for delivering melodies as a solo instrument.
Flamenco guitars have a brighter, crisper sound that has a quick punch that decays quickly. It is an advantage for fast, rhythmic playing.
Flamenco guitarists learn to accompany dance and singing, then learn to play as soloist.
Classical guitarists usually play as soloist before playing with other musicians. Rarely, if ever, would they play for dance.
Flamenco guitarists make extensive use of rasgueado (various right hand strumming patterns), most are not used in classical guitar.
Flamenco guitarists make far more extensive use of the thumb in a technique called alzapúa, unlike anything done in common classical guitar
Classical guitarists tend to approach music as “pieces of music”.
Flamenco guitarists tend to approach music by the song form, improvising it differently each time.
Most classical music for the guitar emphasizes melody and harmony.
Much of flamenco guitar music emphasizes rhythm, with melody and harmony sometimes being secondary (although melody and harmony are present and important in flamenco too).
Each style requires a certain practice regimen, and although they are similar, they are not the same.
The term “Spanish guitar” is misleading, there is Spanish classical and there is flamenco, and they are quite different.
Often, flamenco guitarists give more importance to expression than proper technical form, classical guitarists are often more concerned with proper technique than expression.
There is a kind of aggressiveness which can be employed in flamenco which does not have a place in the classical repertoire.
That said, there are more specific things which can be said, but I hope you find this useful when booking a musician.
I find that someone trained in classical, usually is not very strong at playing flamenco unless they are able to divest themselves of certain aspects of the classical approach.
Similarly, flamenco guitarists new to classical will not be able to play classical without doing the same.
There are some, relatively few, who do both well.
In no way is any of what I have written meant to suggest one is better, only that they are more different than a non guitarist can really appreciate and a discriminating ear will hear the difference.
To listen to several excellent guitarists in either category, listen to the following guitarists:
Classical: Pepe Romero, Manuel Barrueco, William Kanengiser or David Russell
Flamenco: Paco de Lucía, Gerardo Núñez, Vicente Amigo or Tomatito
Youtube is a great place to watch video of all of these great guitarists.
There are many more worthy guitarists in either group, but if you take even just a little time you will hear the differences.
I hope you find this helpful. If you have questions or disagree, feel free to send me your thoughts.


