The two revolvers are essentially the same size. The Colt might be a tiny bit bigger.

I prefer Smith and Wesson revolvers simply because of the cylinder release latch. On a Smith, you push the latch forward. On a Colt, you pull it back.
The push motion feels much more natural.

I’ll add, I have a Smith and Wesson 1917. Back when I was searching for it, I found the Brazilianicon models to be going for nearly the same price. Take your time and you’ll find a deal. I think I paid a little over $500 for mine.