HappySqurriel on 07 December 2012
For lack of a better word, it is your 'imagination' ...
With going to multiple sites, there are consistently more games in the upcomming 3DS list than there is in the PS-Vita list. What you're (probably) being influenced by is that the 3DS has more new IPs and original games and the PS-Vita's list is made up of a lot of ports and/or cheap cash-ins on known franchises.
