Light movers provide lighting to all parts of the plant due to the light's position moving. Colosseums use all of the light from the bulb, rather than having to reflect half of it.
Colosseum > light mover. That's my opinion at least, you'd have to ask someone who's used both, but from what I understand, Colosseum's yield more. You can always make an extra large Colosseum with a light-mover that moves the light around the middle in a circle... basically orbiting around near the wall. That would probably yield more than anything (It takes the best of both worlds).
As for that omega garden, its "extremely simple" watering system is no different than an ebb&flow... only rather than raising and lowering the water, you're raising and lowering the plant to dip it into the water. Bubbleponics in a Colosseum grow would yield more because the plants would get more oxygen to the roots. The rotation might help to strengthen the plant from breaking under its own weight, but if anything I'd say having heavy buds swinging around on the end of the plants would increase the chances of them snapping. With that Omega garden, the only way to help out the buds would be to use a screen(you can't tie the branches to anything because they'll always be moving in different directions), which would be pretty difficult to put into place inside that thing since it moves, it'd have to attach to the ends of the cylinder.
In general trust me:
1. Colosseums yield more than light movers(less light being wasted > getting less light to more parts of the plant)
2. Light movers in a Colosseum would probably be better than anything(very little light wasted AND light to most parts of the plant)
3. That Omega Garden is just a beautified Colosseum tipped on its side that in reality is worse than a simple Colosseum if you're growing marijuana(buds swinging around, can't hold them up easily, can't change the type of growing method, limited to the size of the setup)