Personally, I would go with the Aries despite the safety features and price. I think the Aries looks better (blue button, compared to red and the heat sink is smaller) plus, the Aries uses C batteries... you can buy them anywhere and they even have rechargeable types. I also think the Aries has an indefinite duty cycle (100%) and comes with a great looking aluminum case. Both lasers seem to be of excellent quality and it really depends on what you want. It's all opinion.