The Combination is Crucial
The combination of blade and razor is a crucial factor in getting a great shave.
Case in point: my Merkur 33C Classic razor gives me a top-drawer shave when combined with a Personna Platinum (red-label) blade -- comfortable, safe, and close; but when I put in a SuperMax Titanium blade, the shave is still safe and comfortable, but not nearly as close.
So with this morning's SuperMax blade, I have transferred it to my Merkur 15C open-comb razor for tomorrow. This razor seems to me to be just slightly more aggressive than its cousin, the 33C, so I'll see if that is enough to elevate the closeness of the shave without causing undue insult to my sensitive and vulnerable skin.
If not, then it will go in my vintage post-WWII Gillette Tech.
I'll report out on this in the near future.