EZ-Host is geared towards the non-mobile embedded market such as kiosks, set-top boxes, etc. EZ-Host has up to 4 USB host ports, an external memory interface, and a few additional I/O options. EZ-Host comes in a 100-pin TQFP.
EZ-OTG is geared towards the mobile market such as PDAs, cell phones, MP3 players, etc. EZ-OTG has up to 2 USB host ports and no external memory interface. EZ-OTG comes in a 48-pin FBGA.