User blog comment:Mckrongs/Monster Hunter 4 for the Nintendo 3DS/@comment-216.63.243.212-20120901202347/@comment-1837917-20120902000902

Both P3rd and 3G utilise Unite's weapon system. Tri was unique in its P/G system, or R/B/Y in some cases. The simple fact that there are more monsters in both P3rd and 3G means they can use the multiple weapon pathways better, so we'll have to wait and see for MH4.