Citizen Eco-Drive OnevsVaer DS2 Meridian Quartz

The Citizen Eco-Drive One is widely celebrated for its groundbreaking thinness, with multiple sources confirming a case thickness of 2.98mm, making it the world's thinnest light-powered watch. Owners and reviewers alike praise its "wow factor," describing it as "svelte" and "beautiful" with a titanium case and bracelet that feels exceptionally light on the wrist. The Eco-Drive quartz movement offers a power reserve of up to 100 days, and its miniaturization is considered impressive. However, the price is noted as a significant barrier for some, and one owner finds its aesthetic too plain or dated. Servicing is restricted to authorized centers due to proprietary construction. Overall, owners and reviewers rate the Citizen Eco-Drive One highly for its extreme thinness and lightweight titanium construction.

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.