There is no definitive answer to this question as it depends on personal preferences and what you will be using the airbrush for. Some people prefer gravity feed airbrushes because they believe that it provides a more even paint distribution and allows for greater control over the amount of paint being used. Gravity feed airbrushes also tend to be less expensive than siphon feed airbrushes. However, siphon feed airbrushes are generally considered to be better for large projects or for applications where a lot of paint needs to be used quickly, such as when painting automobiles.