Everything looks like at the end of summer I can be looking into getting a Yorkie girl!!

Now, I have been wondering if it's better to get a puppy or an older one, Pepper will be over a year old by then and he's 6 lbs. I wouldn't want too big of a difference in sizes as it would make me nervous while they play... That's why no tinies, as much as they are very very cute.
Puppy stage is adorable but then you never know what size they will end up being, it is also hard, I honestly enjoy Pep more now that he's older, calmer and smarter. It seemed he only slept and pooped for the first few months but on the other had, it's easier to train them and get them used to the routine when they are that young... Or is it? I'm waiting for comments on both sides, when you adopt a slightly older pup (6 months to 1-1.5 year in age), do they get as attached as when you get a puppy that's 10 weeks old or so? I have a lot of love for 2 pups and I know Pepper would love a playmate