I demoed them both, but can't recall too many details. I think the 7g had more feel and control than the O3 Red. The 7g was heavier and more headlight and had a smaller head, which gave less power but more control. The 7g had a tighter string pattern. I think the O3 is a little like the TT Bandit or one of the other excellent Prince tweener sticks. Easy to play with, but more toned down than the Bab APD+. It feels like a racquet with some technology in it. The demo was strung a little loose, which made it tough to judge. Strung up tighter it might have played better. The 7g feels more old school. The demo was strung tighter. I bought a 7g and play with it sometimes.
It's a nice compromise between my POG LB, TT Bandit, and LM Prestige. Serves and 2HBHs are easier than the LM Prestige (7g has an extra 1/2 inch), short forehands and volleys are better than the POG LB, more control than the Bandit, but it has a little of the Bandit's stiffness and plush comfort. Like the review says, it's all around good. It won't make up for a weakness in your game, but it doesn't have a weakness itself, so it won't uncover a weakenss in your game either.
