I'm not an expert on Tokarevs, so I don't know about the model in 9mm. However, I can tell you that the 7.62 x 25 round is a .30 caliber screamer. It's a very
fast bullet, and you can buy it dirt cheap.
If it were me personally, I'd go for the 7.62 round. Take a look at a CZ52. It fires the Tokarev round and I think it's a better pistol all the way around. It's only weakness can be the firing pin, so pick up a spare, they're cheap.
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