I don't know myself, but I wouldn't say its any diff really unless your not planing to neuter the male..My older dog was never neutered and he always tried to get away, and i dont think it is as healthy for them. I got a female Lab puppy when I had him, and they got along great..except for one thing males like to do of course..but she was spayed before she was old enough for pups.
Good luck :] Maybe you should go by which one you fall in love with? I was suppost to get a male puppy, but I didn't feel an immediate attachment with him, but I did with my labbie girl..Sorry I wasn;t any help