Birmans are longhair pointed cats originally accepted in 4 colors - seal, blue, chocolate, lilac points. Recently, some associations allowed the other colors of red, cream, tortie, tabby points.
Their coat is silkier then a persian and doesn't mat as easily which is great for less grooming
The white markings on the feet and face are one of the hardest to "control" (the white spotting gene). Very few Birmans ever get to be "show quality" because the standard is very strict with the pattern. So there are a lot more "pet quality" kittens born. The cat is still the same temperment wise, but just "mismarked". They are loving cats and on the quietier side.
My fav color is the chocolate points as their coats stay a lot whiter then the seal points.