I like rifle, and I'm glad to see that I'm not the only one!
One thing that I see is the profile of the comb nose - the original has a nice curve to it, whereas your is a bit more abrupt. That really changes the overall look of the stock. I don't know if that is intentional or not, but I at least much prefer the original shape.
The top of the wrist, behind the barrel tang, is a bit higher than on the original, I think, and so the wrist tapers a bit more dramatically towards the rear, only to start curving back up before it hits the comb. If it was my project, I'd look very hard at the upper lines of the wrist and try to get the profile as close to the original as I could - I think getting the wrist to look right, particularly around that very subtle step, is going to be very difficult if that upper profile isn't done first.
I've never done a stepped wrist, but waiting until the trigger guard is in hand before finishing the wrist makes sense to me. Others with more experience may have better ideas, but I do think that getting the profile lines of the comb nose and the top of the wrist right should be the first step, so that you can better judge the angles and proportions of the bottom of the wrist and butt. After getting those right you can inlet the trigger guard and then do the final sculpting of the lock-panels/wrist/comb-nose. That is how I'd approach the problem, anyway. Curious to hear what others have to say.
You might also consider replacing that nose-cap with a slightly longer one, so that the stock gets all the way to the muzzle. Leaving that much barrel sticking out looks wrong, IMHO.
I have a bunch of pics of the original that I'd be happy to share if Bama approves.