For all you Belgian stone lovers out there, let me pose a math problem, for which I do not have the answer:

If the belgian blue is roughly 4,000 grit with 20-30% garnet crystals, and the coti is roughly 8,000 grit with 30-40% garnet crystals, and garnet crystals are what cuts the metal in our razors, then if you had to choose one stone as the only stone you could own, which would it be?

Keep in mind that: the garnet crystals in the belgian blue are larger and fewer, and the crystals in the coti are smaller and more plentiful.

and

Keep in mind that: you may occasionally have to reset the bevel, and you may occasionally purchase old razors just for the pure joy of honing them.