I would say that by now most functionality is much better in Gamma than in Beta. Also Takuma Nakata had since made his learn log about him getting into gamma: https://youtube.com/playlist?list=PLK3HDkvkLePThFo_sp9hPuue_... and also graphics in Gamma. https://youtube.com/playlist?list=PLK3HDkvkLePRQpgCIb8dL9CRS...