I have done some research online and show you the differences among Launch X431 pro mini/Pros Mini / Diagun IV /V & V+ as seems some are interested. Summarizes it nicely. Hope will help you make a good decision.
1. Launch X431 Pro Mini VS X431 PRO VS X431+ VS X431 V Wifi / Bluetooth scanner
|Item||X431 PRO 7inch||Launch X431 V 8 inch||Launch X431 V+||Launch X431 pro mini|
|Update||one-click update online for 2 years free||one-click update online for 2 years free||one-click update online for 2 years free||one-click update online for 2 years free|
|Recording and playback||√||√||√||√|
|Diagnostic Software||LAUNCH Vehicle Coverage Inquiry System: http://qcar.x431.com/|
|OS||Android||Android 4.2||Android 7.1||Android 5.1|
|SIZE||7-inch Tablet,1024X600||8” 1280 x 800 IPS display with 189 ppi||10.1 inch with 1280*800 resolution||6.9 inch 1280 x 720|
|CPU||Dual core 1GHz||Quad core 1.3 GHz||quad-core 1.2 GHz||Quad core 1.3 GHz|
|Capacity (internal / SD card)||2GB||16GB (expandable by up to 32 GB)||8GB||16GB|
|Battery||3000mh, rechargeable polymer lithium battery||4200mh rechargeable polymer lithium battery||6600mAh||3.7V/3000mh rechargeable polymer lithium battery|
|Pixels||: 2 mega rear and 0.3 mega front||Front-facing 2 MP camera and rear-facing 5 MP||0.3M pixels front /rear 3.2M pixels||Front-facing 2MP camera + rear-facing 5MP camera|
|camera with 1080p HD video recording|
|Connectivity||WIFI/Bluetooth||Wi-Fi: WLAN 802.11b/g/n||WiFi/Bluetooth||Wi-Fi: WLAN 802.11b/g/n, Bluetooth: Bluetooth 4.1|
|Bluetooth: Bluetooth 4.0|
2. Launch X431 V 8 Inch VS Launch X431 Diagun IV
The major difference between Launch X431 V 8.0 and Launch X431Diagun IV lies in:
（1）. Lanch X431 V support much more vehicle brands, like Indian (Mahindra, TATA), Australian Ford, Holden, Malay Porton, Perodua, Brazilian Fiat,GM etc, which Diagun IV scanner does not support.
（2）. X431 V comes with much more language than diagun.
（3）. X-431 V 8inch supports special functions like gear learning, immo key programming, diagun IV does not support.
3. Launch Diagun IV vs. Pro Mini:
Diagun IV: looks like a mobile phone
Pro mini: looks like a tablet.
Price: Diagun IV is more cheaper than Pro mini.
4. Launch X431 V vs. X431 V+:
Size: X431 V 8inch X431 V+ 10 inch
Price: X431 V is cheaper
That’s no difference if you don’t have heavy truck diagnosis.
X431 V+ & HD model used for heavy truck diagnosis.
5. Launch X431 Pro Mini vs. Pros Mini:
6. Launch X431 Diagun IV vs. Snap-On Verus vs. Autel:
Launch X431 Diagun IV has the full bidirectional control capability.
There is nothing the versus scan tool can do that the Diagun cannot.
Sometimes you need a power Arsenal.
Turn on time:
Snap on =1:21
Launch X431 Diagun IV:
Real similar a mobile phone
Not bad for the cost.
Best portable scan tool for auto technician and mobile mechanic!
7. Launch X431 V vs X431 V+ vs Launch X431 Pro Mini