Nell and Jack -----> Twins?

I spend my day browsing Woofboard and low and behold, I noticed a dog that looked exactly like Nell (down to her left front white paw)... I thought maybe I had posted her pictures long time ago and I just forgot about it. But when I looked at the user id and post date, it was posted that day. It turns out, pictured boston's name is Jack. Jack and Nell comes from Maryland, but Jack is few years younger. There MAY be a possibility that they are related... but I do not have all the information about Nell, but I do have her breeder's name, so when I can get my act together, I'd like to get in contact with him. So you tell me... do they look like twins?