If you look close you can tell.Glass seems thin enough that it doesn't matter. If you take a photo of the edges of the two it might help to determine. Regular will tend to be green while low iron is typically clearer.
I couldn’t tell either until I got really looking at it. The guy’s shirt is a lighter color with the Starfire panel. The Grey is lighter. The white letters are a little whiter too.i have 53 yo diabetic eyes so there's that lol... I was trying to tell from the bevel but no such luck.
You are correct sir.I would say the bottom one, however you will need more light to properly tell.
1 & 4 are the same pic.Its neither. Its the one with the glow on the edge.. which would make it 1 and 4.