Do you have to choose so young? Can you wait to see what personality traits develop? Color should always be secondary to temperament and two weeks is much to early to judge that. I'm surprised a breeder would allow choices so early. All the ones I've dealt with do not and they match the pup to the buyer based on lifestyle and what the buyer is planning to do with the dog -i.e. service, sport, etc.
My eyes don't do well on a computer screen so I can't really tell from the pictures, but that second pup looks to be blue brindle to me. If that's the case that would be considered dilute, yes?