Ahh, I see. You're saying the Vandoren chart you posted disagrees with the BSS chart.Sorry if my post was confusing-- MY attachment is the actual Vandoren chart, which matches my sense of how these compare. The BSS chart which J-Moen posted has Red 2.5 and 3.5 weaker than Green (though the Red 3's are stronger.)
Here, for example, are arrows for the respective 2.5's. I'm not sure how I could read this as anything other than they think the Green 2.5's are stronger?
View attachment 124153
In any case, given the variability of reeds in any box, I'd say all of these differences are pretty negligible. I use charts like this to just get in the ball park. If I get a reed that's way too hard, I just bend or scrape it a little. Too soft, there's not much I can do. I've never had any success with clipping to increase hardness.
Who knows if BSS may have just gotten a couple of unusually hard/soft boxes of Vandorens to test. It would be nice if the industry could settle on a standard. Oh well.