The differences are so subtle I doubt most people even know if they used one. The examples on the SqD web site are just the ones they found. You have to believe the counterfeiters saw that web site too and fixed those irregularities.
I would hope that the triple beam would be unnecessary at a reputable supply house! Don't the fake and/or gray market goods show up at small suppliers, as opposed to large chain (multi location) suppliers? I can't get a grip that a 'name' supplier...Cooper, Turtle & Hughes, Samson, Graybar etc. that are authorized distributors would have counterfiet items on the shelf.