Can you figure it out?

Can you tell which one is Megan and which is Katelyn? We didn't do this on purpose - but when I was uploading the pictures last night it prompted me to look back. It's pretty amazing how much alike they look when they were little (although Megan was only 3 1/2 mo, and Kate is 7 mo). But they really were about the same size at that point.

So, who is who?

Picture #1

Picture #2