Razer Cobra Pro vs Razer Viper V2

Hello everyone! I'm planning to get my first wireless gaming mouse.

Which should I choose? Razor Viper V2 or Razer Cobra Pro?
How's the quality of the material used?
Do you encounter any problems using the Razer Synapse? If yes, can you share?
Do you think I can manage using this Razor Viper V2 or Razer Cobra Pro? Because my current mouse is Rakk Dal'Ang; Dimensions: 124.3 length * 68.7 Width * 41 Height mm