Well of course they're not. You can't compare the output of a single LED to something that uses multiple LEDs and displays a graphic. That would be like comparing a keychain light to an HDTV. If your intent is just to increase your side visibility at night a couple single leds on the wheel will work fine. They work even better if you use at least two per wheel ( the more the better ). The Monkeylites are great but have the drawbacks of being heavier and having mounting issues. If you want your wheel to remain balanced you will need at least two per wheel. This of course adds more weight to the wheel and this also of course means more money will have to be spent. This is not something that most people want to deal with just to get seen from the side a little better.

My road setup already has great front and rear lighting. Even without any additional side lighting the bike is visible from the sides to a limited degree. Increasing side visibility doesn't mean you have to add more heavier objects to your bike. There are always smaller, lighter options that will, "get the job done". Finding the best compromise is the way to go ( IMO ).