The meso is a little brighter or not as deep blue, more like a blue plus bulb. I prefer it. It brings out some subtle colors. OG is exactly the same as a reefbrite 450/470. All pics under orange lens. The camera didn't pick up the difference well, but you can kinda see the green base of the Lucky charms doesn't contrast as much under the OG.
Meso
OG
Meso
OG