The newer OD green (not sure when they changed it. I got mine in 2011) is darker. If you’re talking about your year, 2001 specifically, if you’re judging by online pictures alone it’s difficult to say. You’d have to have an in person side by side comparison to really make the assessment that yours is darker for that time period.
if it is darker and you aren’t the original owner, call Wilson and give them the serial. They’ll be able to tell you if work was done on it there after 2001
But even if it is darker for the time period, I’m not quite sure what achieving that answer accomplishes for you