Citizen NJ0180-80X Automatic Titanium vs Citizen Eco-Drive Titanium AW1240-57L Men's Watch

Buy the NJ0180-80X if you want a mechanical watch: an automatic movement with a 42-hour reserve, a 40.5 mm Super Titanium case, sapphire crystal and a see-through case back. Buy the AW1240-57L if you want to set it and forget it: Eco-Drive solar power with a long reserve and no winding, in a larger 43 mm titanium case. Both are light titanium Citizens with sapphire and 100 m water resistance, so the real split is mechanical versus solar and 40.5 mm versus 43 mm.

• Choose the NJ0180-80X if you want an automatic movement, a smaller 40.5 mm case and a display back.
• Choose the AW1240-57L if you want solar power that never needs a battery or winding, in a larger 43 mm case.