Cort and Samick are two of the largest stringed instrument makers in the world! They build for brands you know....Fender, Gibson, Alvarez, Ibanez...for example Gibson's Epiphone brand was built by Samick for over a decade. My Ibanez SR Basses, which I love, are made by Cort. These companies are called OEM, Original Equipment Manufacture, companies. At times, there can be contracts that limit the number of OEM branded instruments that they can distribute in the US. For example if Gibson commits to buying 70,000 Epiphone labeled Samick products and they buy that many, then Samick, by contract, may be prohibited from importing any Samick branded stringed instruments into the US! Also, Cort and Samick are both Korean companies.
That said, normally OEM instruments are really good buys. You cut out the middle man! That said, these companies are better at building than marketing! Fender/Gibson are brands with marketing depts. If it plays and sounds good, I'd buy it!