Those two sets of sights (one with and one without dots ) would require different points of aim even though the sights could be physically identical except for the presence or absence of dots. How the sights are used would arguably depend on how the gunmaker expects the sights to be used. Glock recommends using sight picture #2 for sights WITH dots! Glock, in effect, expects the shooter to use the dots to align the front and rear sights, and then to use the TOP of the sights to point to the desired point of point of impact. I think a number of gun makers ex[ect their sights to be used that way. But they don't give us a lot of guidance. One website I visited recently called the "dead on" hold the 12 o'clock hold. They called the hold that has the top of the sights pointed to the intended point of impact the 9 o'clock hold. And they illustrated the 6 o'clock hold with the top of the sights on the desired POA (which was clearly NOT the desired POI). Some (maybe most) of the folks who use the 6 o'clock hold often say they don't need no stinkin' dots on their sights. Only the "dead on" sight picture (12 o'clock hold) assumes that the point of aim/point of impact is based on the position of the dots.