When compared to the standard slide rail, the red dot sits about 7mm lower, which makes a considerable difference in both speed and accuracy. The dot is closer to the bore axis, which makes it easier to find the dot in a stressful situation.
The incredible range and precision paired with a red dot optic make the SSX-23 a deadly precision gun. The red dot does not cover half of your target like the fiber optic sights do.
Also, you cannot make any alignment mistakes which will make your shots more precise, especially at long ranges.