I think it really comes down to the strap here. With the Seiko, you get a very sporty look with the rubber band. With the OceanX, you get a classier, dressier style on the rose gold bracelet. Personally, I would go for the OceanX (I'm not a big fan or rubber straps). It's also automatic, which, I think, is a lot more charming and endearing in the long run. I actually enjoy winding my autos when I haven't worn them in a few days.