CZ 457 or Tikka T1X is a good debate with regard to which shoots better. In his book, Shea recommends the Tikka over a similarly priced CZ, unless someone is willing to "tinker".
More than likely, the better shooter would be based on the luck of the draw with the question of which will have a better barrel. Otherwise, the barreled actions will be a good bet to shoot very similarly.
At $50 more, the CZ 457 MTR is very close in price to the Tikka (which seems to me to have gone up in price more than CZs in the last two years). In my opinion, without any tinkering the differences in stocks makes it hard to choose the Tikka.