I just finished watching OO, and i have to say wow. That Second season was miles ahead of the first. Although, Setsuna being the ultimate co-ordinator, i mean innovator was a bit cheesy, i mean common they couldn't have come up with a better name that didn't end in -ator? The graphics and animation are great, barley any stock footage and no recap episodes! Music, meh Ash like snow is now a favorite of mine, but thats about it. SEED had much better music. Characters, IMO the secondary characters were more developed than most of the main cast in season 1. Also season 1 seemed like it was all build up to season 2. I think they could have done a better job with it though. The main cast all have Shinn esque qualities to them and by the end of the first season they seemed mostly in the same place. I noticed a ton of similaries between charaters in SEED and OO, although i hear thats common between Gundam franchises so i'll let it slip, it didn't bug me that much Except when Louise went all Stella and Saji went all Shinn, oh boy where have i seen that before and of course the aforementioned spoiler Other than that most of the cast in season one were generally unlikable. Also alot of really strange things bugged me. I know its spelt Smirnov, but it sounds like Smirnoff, your one russian character is named Smirnoff? really?. Also meisters? i bet it sounds cooler in Japanese, something was lost in translation. Also the "I'm a GUNDAM!!!" im glad that didn't stick around. However the ending was much more satisfying than SEED's. All of that said, SEED gets my vote. The characters, the tension and the music make the difference for me. SEED had superior character development and the characters were more likable. Plus the takeoff sequences were waaaay cooler despite the hour long set up sequence for Shinn's machine. The stock footage and the recap episodes were a drag, plus some other stuff i could mention. But all in all i enjoyed it more. I did like OO a lot though, definitely looking forward to the movie!