The MIK Tokais are a very nice guitar. The quality of the workmanship is very consistant and in my opinion is better than than any Epi I've compared them to. Of course my opinion can be seen as slightly biased...
There are good and bad in all guitar lines, you'll have more quality issues if your line is mass produced in multipal factories. Your best bet, if your able, is to compare them side by side, I'm sure you'd see and feel the difference. A few of the main points in the Tokai vs Epi battle....
Tokai - Made in one factory in Korea = more consistant quality
Epi - Made in many factories in Korea and China = mixed bag, some good, some not so good.
Tokai - Solid mahogany body, two or three piece.
Epi - ??? Many Epis are veneered on the back to appear to be mahogany. They claim to be alder/mahogany.
Tokai - Canadian rock maple neck with bone nut.
Epi - Asian wood neck, plastic nut.