Looks more like a BLHeli flashed ESC to me. BLHeli with it's ability to program using the BLHeliSetup GUI
is the preferred method. However, it usually require soldering on headers to flash the ESC. I think HobbyKing is cashing in on the method now by introducing an ESC that is likely already flashed. And the header pins already soldered on. They even sell the Toolstick now for a decent price.
Original topic here: