My universal reply to this subject is to look at the old time barbers. Back in the day most used either a 5/8s or 6/8s hollow grind razor and they used these to shave everyone who came into the shop no matter what kind of beard they had. So, if they could give everyone the best shave in the world then that pretty much is a proof in the pudding case.

I think as you use different razors of differing sizes and grinds and with different scales these factors introduce variables which cause you to use your razors a tad differently which can give you different results. That assumes of course they are all equally proper sharp.

Of course barbers approached each customer the same knowing how to map out the beard and used the same few razors all the time.