I've always thought the ESB helmet was the one used for the AOSW display. But some doubts have risen .
When I refer to left and right, I mean if you would have the helmet on, so it would be on the right side of the helmet, not right side of the pictures,
1. the shape seems more flared on the ESB movie helmet.
2. AOSW helmet has more silver battle damage painted on the right cheek area (in the black part).
3. just above the left eye on the ESB helmet there is a small series of silver dots (damage) these are not prestent on the AOSW helmet.
4. in the maroon/red visor area from about halfway down the left side the damage appears to be different. Theres more silver on the AOSW helmet.
There some others, but take a look C 4 u self.
I'm not saying it not the same helmet, but that there are diferences.
Here's a link to one of the ESB helmet pics.
The other pic I compred it too was on the Boba fett Ref CD\Boba Fett\Exhibits\DCB - AoSW, UK (helmet02.jpeg)