I shoot both...
I shoot both...
Frankly, they are both just slightly different focusing mechanisms and I can switch back and forth without any practical effect. I prefer split image with a focus spot in the middle as with SLR. A well calibrated rangefinder with a contrasty patch acts very similar.
An analogy for me is when I learned to hunt in my teen years. I used iron sights for the most part. If you understand the principle of putting the front sight in the notch and put that sight/notch right under the target spot, then using a scope with a crosshair really offers no advantage over slight magnification accompanied by a need to hold the rifle steadier.
The real equalizer in the iron sights vs scope comparison is the stabilization of the rifle with a bench rest, or bipod on the front of the barrel.
In the same way, the great equalizer for a rangefinder vs SLR focus is a monopod or tripod. If you are not using one of these tools, the argument as to which is the better focus system is moot. Either system enhanced by a tripod is the best arrangement, bar none.
Handholding without a physical stabilizer is all ego, whether photography, or shooting a firearm. As a match shooter with revolver, or semi-automatic pistol, I use iron sights and good technique.