Both are good scopes. And since Leupold bought out Redfield, they go through the same testing as the Leupold line. And I think both have a lifetime warranty. So choose the one that you like and don't look back.
I'm a bit curious as to why a 4-12x. Do you hunt a lot of open fields. IMHO for a hunting rifle a 3-9x or even a 2-7x is plenty and on the Encore will look better. The 4-12x is usually longer and heavier. But you can count the ticks on a deer at 200 yards with it.... :-)