USAFRet :
TLC vs MLC...I defy anyone to tell the difference in a blind test.
It's impossible to tell the difference because TLC drives initially write the file as MLC. Then later when the drive is idle, it re-writes the file as TLC. The flash memory cells are just memory cells with analog voltage levels, and can be used interchangeably as MLC or TLC.
Most people recommend the 850 EVO for a TLC drive because it doesn't cost much more than other TLC drives, and Samsung went through a lot of pain to learn important technical lessons about how to properly implement TLC flash with the 840 EVO series. Lessons other manufacturers putting out their first TLC drive may not have yet learned, so they may duplicate some of the mistakes made with the 840 EVO. You're basically beta testing their first TLC product.