Should i buy High Voltage or Heavy Shocker

I have 200 coins. I want to buy one of these two weapons. Should i get a High Voltage or Heavy Shocker.
The thing that confuses me is that Heavy Shocker has more efficiency and is cheaper than high voltage at the same time.
Because usually weapons that have more efficiency(or good) are more expensive than others.
My level is 13.

 

Personally I would go with the Heavy Shocker because both weapons are about the same but the Heavy Shocker has a damage-sphere.

 

I have had heavy shocker (not the voltage thing) before. I would recommend it at it has the damage sphere. It is worth it!