Citizen Eco-Drive OnevsGrand Seiko SBGP007

The Citizen Eco-Drive One is widely celebrated for its groundbreaking thinness, with multiple sources confirming its status as the world's thinnest light-powered watch, measuring between 2.98mm and 3.5mm. Owners and reviewers alike praise its exceptional lightness, titanium construction, and good build quality that avoids feeling flimsy, noting its "wow factor" and superb finishing. The watch features a proprietary, ultra-thin Eco-Drive quartz movement and a synthetic sapphire dial, with some models offering up to 12 months of power reserve. However, its high price, ranging from $3,500 to $5,000, is a significant drawback for some, and its aesthetic is considered too plain or dated by a minority who prefer other Citizen models. The Citizen Eco-Drive One is also noted for lacking a seconds hand and having only splash-resistant water protection.

Grand Seiko SBGP007 owners widely praise its finishing and the quality of its stainless steel case and bracelet with solid end links. The watch features a 40mm case, a smooth bezel, a deep blue textured dial, and Grand Seiko alpha hands. It is powered by the Seiko calibre 9F85 quartz movement. Owners are split on the red seconds hand and gold star emblem, with some finding them too bright or childish, while others defend the star as a mark of accuracy. The $3900 MSRP is debated, with some considering it high for a quartz watch. Overall, owners rate the Grand Seiko SBGP007 highly for its exceptional finishing at the price point, despite some debate over aesthetic details.