Alzrius
The EN World kitten
It's worth noting that there's little hope of reconciling U_K's epic system with whatever epic-level material Paizo produces for Pathfinder.
Why? Because all indications are that Paizo will (correctly, in my opinion) enforce a hard level cap for epic-level characters, at which point they simply cannot gain anymore levels; U_K's system, in comparison, is meant to work with 3.X's ability to gain infinite levels.
Now, the two will likely be compatible, in that if you want to do away with the hard level cap that Pathfinder will use, the Immortal's Handbook will likely be your best bet (as it comes with its pantheistic worldview built-it), but that's about as compatible as they'll get.
Why? Because all indications are that Paizo will (correctly, in my opinion) enforce a hard level cap for epic-level characters, at which point they simply cannot gain anymore levels; U_K's system, in comparison, is meant to work with 3.X's ability to gain infinite levels.
Now, the two will likely be compatible, in that if you want to do away with the hard level cap that Pathfinder will use, the Immortal's Handbook will likely be your best bet (as it comes with its pantheistic worldview built-it), but that's about as compatible as they'll get.
