I'm not sure where the MedPreps are on the scale, but I like them a lot. They've kind of been my goto recently. Kai is my second choice. Currently really liking MedPrep in the R41. I'm about to do shave 8 with that blade today. Going to see how long it will go.
Yes... I get a similar vibe from MedPreps and 7Oclock Yellows. It's a nice smooth pass with really crisp sounding feedback that's just a tad louder than average. Then when you splash water on and rub around a bit to feel for stubble, there's a bit of a dermabrasion feeling that says: "Ya might want to focus more on the task at hand, because this blade is not messing around." But if you use MedPreps in an R41, it won't be a strange feeling for you. That's a very efficient combo and not something I'd get a son or nephew as a beginner setup, haha.