Citizen Eco-Drive OnevsVaer DS2 Meridian Quartz

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.

The Vaer DS2 Meridian Quartz is lauded for its wearability, with reviewers and owners consistently praising its 39mm case size as a perfect fit, noting its thinness at 10.4mm. The watch features a satisfying 120-click coin-edge bezel with minimal back play and comes with two straps for $239, powered by a Miyota GM12 quartz movement offering a three-year battery life. On balance, owners and reviewers rate the Vaer DS2 Meridian Quartz highly for its comfortable wearability and accessible price point.