I can't compare because I have not used the Vortex scope. Assuming youíre talking about the Clearridge Ultra XP5. Ultra XP5 4.5-22.5x50, Mil Dot I have been using this scope the last 2 years and have killed 2 elk with it. Having 4.5 on the low end and 22.5 on the high end is a great luxury. The scope has performed well so far. The optics are clear and dialing up for elevation is accurate and consistent.
When discussing caliber, Dead is dead and itís not worth arguing about.