Actually, if you look at Jango's helmet, it's a different type of dent. You hear him hit his head when he's getting into Slave 1 after battling with Obi-Wan on Kamino. His head even bumps down as he hits it, and you can hear the clang. If you look close, Jango's helmet has a dent that's in the shape of a line and it's located higher on the helmet. Boba's dent is located more towards the front of the helmet and is more circular in shape. The scoring around the dent suggests it's from a blaster hit. Jango's never had any type of scoring around his dent, since it was more mechanically done. Make sense?
Here's some pics for reference:
This is when Jango gets his dent:
Here, you can see he has it, as he's shooting the long-headed Jedi on the Balcony of the Arena, before he fights the Reek:
Here are some really good close ups of the helmet that Star Wars chick took of the actual costume at the 2005 Paris L'Expo:
Now, here are some Boba helmet pics to compare it to:
The dent really stands out on the pre-production version that was painted white, before they decided not to go with the "Imperial Bounty Hunter" theme (This was taken from one of the Lucas Film Star Wars Photo Archives books):
Wow!! Didn't mean to put so many pics on here, but you see what I'm saying?
--Sadriel Fett (BFFC Moderator)
"I'm just a simple Fan, trying to make my way in the universe."