1. ND900 is the China version CN900 car key copy machine. They perform same functions, different in outlook. (PS: they use different 4D, 46 cloner box when copy 4D/46 chip).  So Mini version CN900 is abroad version and mini nd900 is domestic version instead.
2. CN900 mini inherited most of CN900’s feature but mini one make car key copy easier without connecting with 4D, 46, G Decoder Cloner Box.
3. Mini CN900 comes with built-in battery, do not need to attach to the power adapter.
4. CN900 Mini support WiFi, Bluetooth and internet connection. The big size one do not support.
5. CN900/ND900 Mini will replace big CN900 in the near feature.

CN900 MINI Reviews:

1). it reads and copies all 4C easy, 100% works.
2). Mine comes with 4D -decoder, it failed decoding most of the first time, but if you keep trying a couple of times, it will work eventually. the decoding time is   about 2~3 minutes.
3). it does NOT copy 46, and will never do without adding external box- 46 Cloner Box, e.g extra money.
4). CN1 and CN2 can be re-used over and over again, big plus when doing 4C eeprom production.
5). its size is same as carbon chip,
you can put them into remote key. For some jobs I’d rather copying than programming. Minor extra cost but safer and quicker, move on to next job quicker.
6). It allows you to edit 4C / ID13 EEPROM data on screen, it helps me doing a lot of hard jobs like Toyota 4C , Honda red key systems..
7). it reads Toyota Smart key data.
8). Touch screen and fast boot-up time in 10 seconds.
9)Meant to beat out the Handy Baby from the market, but as far I see without success. This one is the handheld version of the CN900, as the developers said with all of its abilities. Ok, this info comes from my dealer: the mini knows only 80% of the HB's work tested on real cars. If you have handy baby you don't need the cn. Price is around $190 with free shiping.