Launch X431 Diagun IV and X431 V 8inch, which one is better choice ?

Launch X431 Diagun IV VS X431 V 8inch 

Launch-X431-V-8inch-and-X431-Diagun-IV-Comparison-List-1 Launch-X431-V-8inch-and-X431-Diagun-IV-Comparison-List-2Launch-X431-V-8inch-and-X431-Diagun-IV-Comparison-List-2

 

 

 

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