I have the Merkur 33C and a 40's Superspeed. The superspeed is the milder of the two and is extremely forgiving, but with the same blade in both razors the merkur gets a closer shave without being irritating, the merkur has a lot of blade exposure though and if you load it with a crappy blade it'll eat your face off.
I was hating the merkur because it was cutting me so much until I used a quality blade. I got it for $30 shipped from amazon and it came with 5 big ben blades which were the face eaters, now I love it with gillette blades. My Superspeed I got for free from an antique store because it looked like crap after being used every day for what looked like at least 30 years (and because I was nice to the lady), it cleaned right up though and I was about to PIF it until I used it. Needless to say it's not going anywhere now, I love how it shaves. Both razors are the same size and weight, TTO is nicer to load than a 3-piece, but that's just being spoiled.
Manufacture date does matter with gillettes, the older they are the better quality they are in general. And vintage Gillettes are about the best you can get (especially for the price). American cars are second rate in quality, but when it comes to DE razors you can't beat a Gillette, my superspeed is the same age as my dad (63) and it could easily last me the rest of my life. As nice as it looks, my merkur is just pot metal that has been chrome plated to look nice.
If money isn't an issue I could suggest a Futur or a Progress, they will serve you very well and last a long time, super quality and very attractive. But apply Occam's razor to your purchase and realize that more money doesn't necesarily mean that you get what you pay for. The amount of money you need to spend is only as much as is needed to buy that one razor that feels perfect on your face. But who am I kidding, most everyone on here has RAD chasing after that one perfect razor that will give them the best shave ever.
So that said, take the wad of cash you were going to spend on one super quality razor and invest in a few vintage razors and a few new ones. You can either keep them all, or sell them, or PIF them later someone else who would love to shave like this but doesn't really have the means to do so. The spirit of giving and honor is very much alive in this place!