Pachter says Vita's first three months will be better than the 3DS first three months.

[DemoniOtaku]

I think the Vita will beat the 3Ds 2 months after the USA/European release... The Launch lineup is better and larger on West regions and the games are more of the taste of Westerns..

I see the japanese release as some kind early... may be was just a test for the hardware and software...