I gotta stand up a little for my man Kelco. My gamers are 1/4" between irons. Even after all these years I feel they are very good but something is just a hair off. Latest experiment was to make the PW and 9i the same swingweight as the GW. GW was D1, the others were C8.5 and C9. Surprisingly the extra weight helped a lot. It let me feel the head in the swing much better, and the on course results were better.
So then I turn to the 7 and 8 irons. Before I checked them, I took some some practice swings, paying attention to the backswing feel. I decided the 8 was definitely lighter than the 7. Guess what, it was a half a point (1 gram) lighter than the 7. Kelco and I can't imagine what you cavemen are feeling in your clubs!
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I've always said that your golf brain can feel differences that your conscious brain cannot.