Citizen Core Eco-Drive AW1231-07E vs Citizen BI5002-06E

Both are simple, solar-or-quartz Citizen dress watches with mineral crystals and 50 m water resistance, so the choice comes down to look and movement. The AW1231-07E is the safer pick for most people: it runs on Citizen's Eco-Drive solar movement, so it never needs a battery change, and its 40 mm steel case with a black leather strap is a clean everyday wear. The BI5002-06E adds a date window and gold-tone case with brown leather, which suits anyone who wants a warmer, more traditional dress look. Owners of both report reliable timekeeping; the Eco-Drive is the more modern, lower-maintenance design.

• Choose the Citizen Core Eco-Drive AW1231-07E if you want a battery-free solar movement, a neutral steel-and-black look, and the least upkeep.
• Choose the Citizen BI5002-06E if you want a date window and a gold-tone case with brown leather for a dressier, warmer look.