I also have both lights and I use a small additional battery light on both bikes .

I prefer the CYO premium over the IQ-X for off road, because it does not flicker as much at lower speed and although it is not as bright it spills more light to the sides than with the IQ-X light.

With CYO I also run a cheep battery light to get more light in front and to the sides. IQ_X is brighter but borders between light and darkness are much sharper, so you not see to corners too well. For that reason I also prefer to run a small battery light with wider beam, even on the road.