The iFive 3 is a 9.7-inch tablet with the same specs as the 7.85-inch iFive Mini 3. Both have Retina-class 2048 x 1536 IPS screens.
The main difference is the battery capacity. The 3 has a 8400mAh battery, the Mini 3 will have 5200mAh. I’d be very surprised if anything else changed because it’d upset the economies of scale Five Technology gains from keeping all else the same.
Note also that the 3 here is running Android 4.2.2 while the Mini 3 will have Android 4.4 KitKat.
A forum poster has a long thread about it [Google Translate].