Which better AUTOBOSS V30, MaxiDAS DS708 and Launch X431 V+

Which better AUTOBOSS V30, MaxiDAS DS708 and Launch X431 V+
Product Name		LAUNCH X431
Item No.	SP31	SP160	SC39-B	SP184
Price	$499+ shipping	$1,099+ shipping	$1,099 free shipping + one TS401	$1,759 free shipping
Highlight	Original touch-screen tool	Original touch-screen tool	Original touch-screen tool	Original touch-screen tool
Wifi	NO	NO	YES	YES
Bluetooth	Yes	NO	NO	YES
Print	Yes	Built-in Mini Printer	Yes	Yes
Language	English, Spanish, French, Russian, German and Traditional Chinese	English, Spanish, French, Italian, German, Russian	English, Spanish, French, German, Portuguese,Russian	English, German, French, Italian, Spanish, Portuguese, Polish, Russian, Japanese, Traditional Chinese
Reset Language	The default language is . if you want to reset language, please supply serial number.	When the user receive the package, The default language is that you custmized,to reset as other language is allowed by supplying us serial number.	The default language is that you custmized,to reset as other language is allowed.	When the user receive the package, the default machine is the language that you customized, to reset as other language is allowed.
Update	One Year Free Update Online	one year free update online,after one year charge 279usd.	one year free update online,after one year charge 695usd/Year for USA and Canada Customers, and 500usd/Year for the other customers from other areas.	One year free update online,after one year charge 750usd
Operation System	Windows CE.	Windows CE	Windows CE	Android system（Huawei pad）
Memory	2GB SD Card	64M	with 4GB SD memory card	1G with 8GB Storage card
CPU	SAMSUNG ARM 2410A, 200MHz	SAMSUNG ARM9 2410A, 200MHz	ARM9+ARM7 Quod-core processor	HUAWEI HiSilicon Quod-core 1.2G HZ LAUNCH X431
Main Function	Diagnose	Diagnose	Diagnose	Diagnose
Special Function	Key programming, electronic parking brake, service light reset and much more	Electronic parking brake, Service light reset and much more	key programming, such as 99 Nissan Maxima2004 infiniti G35
Car list	Cover more  LAUNCH X431 than 57 makes, 40,000 vehicle system	More than 57 makes.	More than 50 makes(no Chinese carlist)	More than 60 makes(Global Version add India,Australia).