Casio Men's Wave Ceptor Solar Radio Watch Multi-Band 6 WVA-M640B-1A2JF vs Casio Wave Ceptor Illuminator WV-200R

Both are Casio Wave Ceptor radio-controlled watches, but they serve different buyers. The WVA-M640B is the dressier pick: analog-digital display, stainless steel and resin case, 43.5 mm, 45 g, and 100 m water resistance, with Multi-Band 6 covering Japan, China, the US and Europe. The WV-200R is the tougher, simpler tool watch: resin case, 47 mm, 200 m water resistance, a backlight and a 1/100-second stopwatch, but it syncs only to the US WWVB signal and runs on a CR1620 battery rated about three years. Owners of both praise Casio's radio timekeeping; the WVA feels more refined, the WV-200R more rugged.

• Choose the Casio WVA-M640B if you want a slim, dressier analog-digital watch with solar charging, Multi-Band 6 worldwide sync and 100 m water resistance for swimming.
• Choose the Casio WV-200R if you want a rugged resin digital watch with 200 m water resistance, a backlight and a 1/100-second stopwatch, and you live within reach of the US WWVB signal.