I would not know, except from the point of view that they surely make a difference to the wallet.
What matters is, did you find your old standby good enough? If so, recall what Voltaire said, "The perfect is the enemy of the good."
And for a more up-to-date take on the matter of "choice":
http://www.amazon.com/Paradox-Choice-Why-More-Less/dp/0060005696/ref=sr_1_1?s=books&ie=UTF8&qid=1312593207&sr=1-1With this being part of a review:
"Who woulda thunk it? Here we are, in the early years of the twenty-first century, being driven bonkers by the staggering array of consumer goods from which we must choose. Choosing something as (seemingly) simple as shampoo [or a razor?] can force us to wade through dozens, even hundreds, of brands. We are, the author suggests, overwhelmed by choice, and that's not such a good thing. Schwartz tells us that constantly being asked to make choices, even about the simplest things, forces us to 'invest time, energy, and no small amount of self-doubt, and dread.' There comes a point, he contends, at which choice becomes debilitating rather than liberating. Did I make the right choice? Can I ever make the right choice? It would be easy to write off this book as merely an extended riff on that well-worn phrase 'too much of a good thing,' but that would be a mistake. Despite a tendency toward highfalutin language ('the counterfactuals we construct can be tilted upward'), Schwartz has plenty of insightful things to say here about the perils of everyday life. --David Pitt
Point? I think we over-analyze the quality of our razors, and that most kinds will give a "good enough" result. However, I'm sure some others here will swear otherwise and that they have, of course, found the "perfect" razor. So, if price is no object, fine. But recall, basically any car does the same thing: Point A to Point B, and while a Lexus might seem "better," from the POV of getting around, even the rustiest working clunker will do the basic job. Razors, likewise, I'd say. Come on, I don't mean "rusty razors," I mean basic ones.
Confession: I use a single blade razor; always have and probably always will. It's good enough. And the blades are damned cheap (like me--there are too many other more pressing demands on Ming's Imperial Treasury).