I remember a thread awhile ago along the line of "what Vita titles would you like to see on the 3DS" and amongst his reason of asking this question was because of the lacking sales on both the Vita and it'software
as I said to him is what proof do we have that the sales would be greater if on a bigger userbase; true the game has the potential to sell better because of the bigger install base but:
1) what again makes you think the Vita fanbase and the 3ds fanbase are the same type of people
2) which relates to the question in #1; is within the install base lies different types of gamers; core/casual/and those in the middle...this speacially is show in the DS brand as certainly those 140+ mil people who bought one all didn't have one game in mind when buying it
we have no definite proof a game such as Tearaway(since you used that in you op) would have done better sales wise if on the 3DS...though the small sales the Vita does have it still bring competetion, If Nintendo had it's way their would be no alternative to whatever they presented to the market.
