Let me start by saying I'm a solid Brittany man myself. That said, all pointing dogs have some English Pointer in them. The breed is the most refined pointing breed there is with hundreds of years of breeding to produce the best dogs for pointing. They will have a "longer nose" than other breeds, can run faster and longer than the other breeds, etc.
Of course there are always exceptions, but there is a reason that pointers win the national gun dog championships and fill the hall of fame. Personally speaking, I don't like their personalities (fighting words, I know). But as far as breeding goes, no other breeds come close and if you had to choose one breed that does, it would be the English Setter which also has a lengthy breeding history for pointing (or "setting") birds.
But I love my Brittanys and will stick with that breed as I love them in the field and in the home. Regardless of breed, go with a proven breeder and spend the time and money to train your dog right and you'll have a great field and family dog.