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+1 on pairs.
Especially so if you have a new razor that you like a lot.
There is a window when it is easy to get another one just
like the one you have, perhaps with slightly different scales.
...

I was reviewing my shaving rotation and it dawns on me that seven razors
is a pile of razors. I had eight in the active jar and I find that I reach for
a couple over and over.

Since the...

Call the vendor and ask what the differences are.
stuff like.. grind, polish, finish and scales. Ask
them to compare and contrast with the razor you
have and like.

I would bet that these have...