I received the famicom mini that I ordered from a japanese ebay seller and overall I'm impressed with the build quality of the system
the famicom mini has 8 games which are unique to it vs. the nes classic
the 8 titles found on the famicom mini:
atlantis no nazo, downtown street challenge, final fantasy III, mario club golf, river city ransom, solomon’s key, tsuppari sumo, and yie ar kung-fu
replace these 8 on the nes classic:
bubble bobble, castlevania II: simon’s quest, donkey kong jr., final fantasy, kid icarus, punch-out, startropics, and tecmo bowl
additionally, the famicom mini comes with 2 [hardwired] controllers which [are 40% smaller than the original famicom controllers and] fit into the sides of the system, just like the original. however, the microphone and volume adjustment slider on controller two are just a sticker and part of the molded plastic (instead of being an actual functional feature (the japanese version of zelda took advantage of the microphone and player's could defeat the pols voice (the large eared mouse looking enemies) by shouting into the microphone
finally, unlike the us nes classic, the famicom mini does not come with the usb to ac convertor. that is sold separately