My current stash is Gillette Silver-blue, and gillette 7 oclock super platinum (black)
One of the things I have found is that not only do you have an overall "sharpness" of each blade, and a longevity curve, but also that you may be more or less sensitive to how a particular blade works in a particular razor handle. For example, I don't find feathers to be "unrefined" at all in my gillette comb tech, but that they are so sharp that I can easy over-do a patch if I'm not being good with my prep. I also find that if I don't prep well when doing my scalp, my gillette adjustable will "skip" a bit, and the silver-blues will happily take a slice. Are those the blades fault? I don't think so.
I've also noticed that there can be a subtle difference in the flexibility between blades, and so how supported the blade is in the handle may make more of a difference in some instances. Since we are often talking just the slightest amount of leverage and razor handles, depending on age, can have pretty loose tolerance between units, there suddenly becomes this massive number of variables. All that is a long way of saying, shave what you like.