Alicia, remembering that they are two totally different kids is really important, as you've realised My eldest is a boy and he was huge! Rolls on top of rolls, but when I had his sister, they were fed the exact same way only she was a hell of a lot smaller and more petite. It took a lot of work on my part to stop comparing them and let things be as they are meant to be and stop stressing that she wasn't big enough just because her brother was big.