There are a few differences between these two Innova devices. Firstly, the Innova 3160 is slightly more compact than the 3160G. Also, the 3160G boasts a color screen whilst the 3160's screen is black and white. Finally, the 3160 is a little heavier than the 3160G. Check out our 3160 review for more information about the device. The review can be found at the start of this page.