Hold it!
In the flashback, Cloud thinks he was in SOLDIER, n'est-ce pas?
So should he be dressed like a normal Shinra MP in his "Young Cloud" avatar?
Actually, if you could find a picture of his face in Advent Children where it looks like he
could be wearing a SOLDIER uniform, you'd have the ideal avatar (since he
looks like he's 16 in AC, despite being 23
)