Can't speak for anyone else, but for myself, having a condition which both forms of CoQ10 directly affect, and therefore making them comparable.
Years ago I at times suffered stress related (mental or physical) angina-like chest pain. When starting to supplement Ubiquinone found that at a dose above 160 mg/d these chest pain didn't come back. Later experimented with Ubiquinol, where half that dose had the same effect. Still holds true years later. With the only difference that now, if I only discontinue either form of CoQ10, such chest pains are back even without any stress. I'm hooked 
So if the ubiquinol is only up to double the price for ubiquinone, it's worth because of it's double efficacy. Usually take a combination.
Edited by pamojja, 10 January 2017 - 12:02 PM.