It depends on the tank. Starfire glass is a low iron glass. Low iron glass has a much lighter green tint then conventional glass.
Certain popular manufacturers use low iron glass: innovative marine, Red Sea and water box. If you want a large tank, you pretty much need to go custom to get low iron glass.
Sometimes your local fish store can get some nice ones ordered and custom to your liking. For a good price too! But crystal dynamic and Red Sea do make really nice tanks