I much prefer the hawkeye stock; the comb was reshaped, the forend is thinner and my smallish hands get a better grip thanks to the wraparound checkering, which I always prefer to panels.
The trigger is better too, but an adjustable would be the greatest improvement.
Like woodlotowner, I prefer the Mk II's metal finish to th Hawkeye's; I like matte finishes just fine, but the Ruger matte is greyish and scratches easily.