To: quattro I believe that the Stongard is 40mil thick and the Griot's 3M is 20mil...or whatever the mil is, Griot's is 1/2 of Stongard I believe. I'm thinking that the 3M will protect against minor pitting but not be as useful against boulders...but without the fry risk. I think I'll go Griot's since the lense on my Euro's are replaceable. RoTorture