Let's talk about thick cap vs. thin cap in the Old type Gillettes. My impression is the thicker cap is the superior shaver, but I'm not sure why? I suggest the thicker head gives more stability and mass, but beyond that . . . I don't know.
I find the thicker head cap to be less forgiving, but more efficient. The old types are my favorite by far, I'm surprised they don't have more fans here.