For the difference in dollars, I vote for the CZ 452 series. I have no experience with the Encore. I do have an Annie and three CZ's. The annie is a .17HMR and the CZ's are all .22's, so I can't give you a fair accuracy comparsion.
But each of my CZ's will shoot right along with my Kimber Hunter. The Kimber was twice the price of any of my CZ's.