What is the difference between a greek gladiator helmet and a roman one?

if you could add a picture that would be great. be a specific as possible.


im trying to make a mosaic of a gladiator helmet for latin class and i want to make sure i get the shape/design right.


please and thank you.|||http://www.google.com/imgres?imgurl=http鈥?/a> - roman helmet











http://www.google.com/imgres?imgurl=http鈥?/a> Greek.