I happened to see a photo this morning of the royal family at a recent charity tennis match, and I was thinking that Miguel (at least in this picture) really looks a lot like Prince Philippos of Greece when he was a boy. Here's the picture:
http://www.ppe-agency.com/500px/Dec2010/PPE10122232.jpg
http://www.ppe-agency.com/500px/Dec2010/PPE10122232.jpg