Looks like the mag tube is coated, the hammer and perhaps other trigger components. Is the bolt or other parts coated? Couldn't tell that they were when looking at the JM version.
How much of a difference will that really make? Seems it it like getting the BCG on an AR hard chromed, can help with cleaning but may not necessarily add to amount of shooting between cleaning and life of the gun.
From my perspective it still comes to down to how much effort to find the gun and how long would it take. Here in SE Idaho there are 5 to maybe 6 shops at most within a 75 mile radius that might have a JM version. If a person is willing to wait to find the JM version and perhaps pay a premium that is up to them. If you don't want to wait, you can get an almost identical gun with a little work in ordering parts and having some barrel work done.