haha, your little guy is soooo adorable! Big though! I have 2 yorkie brothers. They are still puppies at 9 months old... but 1 is 4.5 lbs and his hair is very soft, almost curly and his black is more steel gray and he is turning silver. Hes very squat and his legs are short. His ears curl over too. My other guy is VERY long & lean, weighs about 8.5 -9 lbs. He looks more like your guy with the up ears, his colors are JET black and tan/butterscotchish, his legs are long and his hair is very straight. They are both from the SAME litter!
I hope that helps!!! People ask me all the time why they are so different if they are brothers. I think its a dumb question! Not all the puppies are born EXACTLY the same