Spotted in Asia, MSI's new GTX 680-L's has lower clock speeds than MSi's original GTX 680 Lightning, featuring a 1019 MHz core, as opposed to 1110 MHz and 1084 MHz Boost clock instead of 1176 MHz. For the sake of comparison, Nvidia's reference specifications show a base core clock at 1006 MHz with GPU boost speed at 1058 MHz.
Aside from the aforementioned changes to the the core speed, none of the PCB parts have changed and the card still comes with MSI's TwinFrozr cooler which means that an experienced overclocker could easily match the GTX 680 Lightning's clock speeds and save a few bucks.