I have both of these units, the horus is a better unit in every way . it does have a few drawbacks. it is bigger and more bulky and the level bubble is a bit small. if size is not an issue then the Horus is the way to go , if size is an issue then the sniper tools with seperate bubble level works.
It takes 43 muscle's to frown and 17 to smile, but only 3 for proper trigger pull.