OK, I saw lightweight versus full size in the description and missed that the lightweight was a 5" barrel. I was thinking it was a Commander class or such. The recoil mechanisms do differ though, aside from the steel vs aluminum.
It can reduce a little bit of muzzle climb, but so will hanging a light off the front of the gun. For those reading this thread that are interested, be advised that in IDPA you can't have a 5" bull barrel.
If you don't want the black/green, go with the Lightweight Operator, it has all the same features as a regular Loaded from Springfield. The MC Operator is the "low cost" replica of what they made for the USMC.
That's what I'm thinking.
The TRP Light Rail is a fine gun, but if you don't plan on shooting it a lot, I think it's overkill for your intended usage.