Original glass or new glass?

[chewychevy67]

I have my new glass for my 67 here and my original all cleaned up as well except the windshield. My old glass seems to be a hair thicker and machined on the edges a bit nicer but it has a few scratches in it as the new doesn't....yet. m y build is pretty thorough and everything has been replaced but is the thinner glass going to cause problems? Anyone with ay insight on this. Part of me thinks I should just reuse the original stuff. It's the green tinted stuff.