Well, you're right, because the 57 and 58 are both good mics.
The v67 and v93 are condensers, though, so they will give you a different kind of sound -- more accurate and detailed in most cases.
This can be good or bad, as some people will actually prefer the relative inaccuracy of a dynamic . . . it can sound warmer.
The major differences between the 67 and 93 are in the transformer output, and in the added features. The 67 has one (a transformer), while the 93 is transformerless. The 93 is relatively clean, accurate, and neutral in sound. Moreso than the 67. The 67, in my opinion, has more character or flavoring to it, though.
The 93 also has more features: bass rolloff switch and -10 pad. Plus it comes with a free shockmount. For that reason, I can't help but think the 93 is a much better deal for the money.