Lloyd, good valid points you make. Don't take me as an argumentative type because I prefer the 45. I just enjoy pointing out the benefits. Here's another: All things being equal, my 45 gets more velocity with less pressure than your .44. If the case is bigger, it will hold more of any given powder. If I choose say a 300 grain bullet and you choose a 300 grain bullet, guess which one hits harder if loaded to maximum potential. The fact that we can buy even bigger revolvers, like the .460 or .480, or .500 takes nothing away from the obvious difference between .44 and .45, because those two are so similar in size and weight. In fact, my part alloy Blackhawk in .45 is lighter than your Super Blackhawk or your 629, yet, it's more gun in every regard.
Still, it makes no sense to beat that horse. The .44 will get it done, with no less authority than my .45. I reckon it just comes down to numbers and ballistics, which are not visibly important when it's time make meat.
What is visibly important to some is the lettering on a ".44 Magnum." In terms of images that come to mind with that lettering, most people see the most powerful revolver in the world. They see a man who is man enough to handle that kind of awsome power. When they read ".45 Colt," they see cowboys on the trail eating a pan of beans, using the gun of that day for his daily cattle driving and street fighting. It's all perception; it's what our minds tell us is best for our purposes. Therein lies the truth of the matter: A .44 Magnum is not the "best" for any purpose when the .45Colt is available. Good enough, sure, but not the best. So, you say, a .500 Smith should be even better, but that ain't so because it's too dern big for most purposes. Bigger don't make something "best," but bigger is definitely better when comparing 44/45. Not much, but some.