I can definitely see the difference on all 3 changes: The Blade Hump is much smaller, the hilt is almost mirror-imaged, and the micarta handle is either less rounded or a bit thicker.
As a carrier/user..I like the thicker handle, it makes it feel like a much "bigger" knife than the thinner, new-style handle.

Any explanation why the changes and which is closer to the actual "Flight Spec'd Astro"..any idea how old it may be?