Which dog should I choosee.?

It depends. They both have both pros and cons. The rescue dog, is already probably trained and it's probably very loyal too since it's a rescue dog. However, since it's an older dog, he might take a longer time to adapt. The puppy, however is cuter, and you'll have an experience training him. He'll probably adapt to you quickly, since puppies usually do, but you'll have to potty train him, he'll probably pee all over the place, and chew anything he can get his mouth on. I would get the rescue dog, but that's just me... :)