Personally, I agree with the idea of merging them. Another example (to keep this topic related to Taurus pistols): The Taurus PT99 is just an adjustable sight version of the PT92, and it is on the PT92 page instead of a separate entry.
I also agree with the idea of merging the S&W Mod 10 and Mod 15 pages - I had forgotten that this was ever done.
I guess it goes to show how frequently page separation and grouping has historically been at the whim of certain individuals.