With sidespin, the tip and shaft push the cue ball partly sideways as well as forward. That squirt is compensated through aim. A low-deflection shaft is designed to reduce the correction, not remove it.
Compare diameter, stiffness, joint, weight and the maker’s test method. After switching, practise repeated sidespin shots; one hit proves nothing. Do not compare brand claims made under different methods.
The design suits players who use spin and are ready to recalibrate. A consistent conventional shaft may be easier for a beginner to learn.