Could someone please explain in detail the differences between the S&W M&P R8 and the S&W 327 TRR8. The only differences between the two that I could pick up off S&W's website was the 327 TRR8 has a skeletonized ejector rod shroud (ejector rod visible from left and right side of gun) where it is not on the M&P R8 and the 327 TRR8 has a removable accessory rail under the barrel where on the M&P R8 it is integral to the barrel. I can't believe these are the only differences, or why would they make two different models that are so similar? Could someone please explain any other differences and why would one be preferable to the other?
I would also like to see some photos of either of these two guns, especially outfitted as they are intended to be with lights, red dots, etc. I'm thinking "Nightstand Gun!"
Thanks in advance!