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.
Yep. My three elder bubs were all in the Top 5%, DS2 was actually in the top 2-3% for his age (and I had CHN's trying to suggest I was overfeeding my DD1 and DS2). DD2 is just absolutely tiny in comparision, and is in the bottom 5% in the charts. I figure, that babies need to come in all shapes and sizes, just like adults, so thhat they can draw up these graphs in the first place - so long as they are on the chart, and progressing at a steady rate, its all good.