I own both of these optics.
I just recently acquired the Vudu, so I have much more time behind the ATACR.
So far, I like the ATACR much better, but I paid twice as much for it.
If price is a consideration, the Vudu is a great optic for the money.
If it’s not, get the ATACR.
I like both of them better than the Vortex 1-10.