They both make quality watches, and any fan of Asian timepieces should have room for both in their collection. I think you see more talk about Seiko in the collecting community simply because they produce a lot more mechanical watches, and those are generally more popular among the WIS crowd. I agree with others that Citizen generally has better bracelets at the same price point (solid end links, forged push-button clasps, etc). On the other hand, Seiko's Lumibrite is the gold standard for lume, and Citizens rarely glow as brightly. As for rechargeable quartz models, you've got solar-powered Eco-Drive versus motion-powered Kinetic, which are both reliable and effective technologies. And as far as styling goes, Seiko tends to be a bit more traditional, while Citizen tends to push the boundaries (those are gross generalizations of course). In the end, it really comes down to personal preference and how much you like a specific model. I'm a big fan of both.