k3's old website iBots and current mechmarket clones are both missing the marks on the bottom of the stem that I believe have been on MX V2s since long before Nuclear Kush was released. I'd say there's a fair chance that this one is real (though this is all based off of available/provided pics).
Are you taking about the sprue marks, or the indents for MX blues?
The sprue marks. The bottom pics of the three public iBots k3 has on his website all lack them, and the one picture the "look at me, I got k3 clones" guy posted of the bottom of his cap (which was straight clone) also lacked them (pic quality was poor though). From what I can tell, the earliest V2 sales lacked them as well (or Bro had more time to sand then), but MX V2s from sometime around the Independence Day sale and on the marks became (more) apparent.
I could be wrong, I was just trying to find some identifiable marks to discern between the two, and this was the most obvious thing. I've never owned an MX V2 though, so maybe not the best person to do this.