Seiko 5 Sports SKX GMT SSK003 vs Seiko Prospex Solar Diver

The SSK003 is the everyday pick: a 42.5mm steel GMT with a 4R34 automatic, 41-hour reserve and a rotating 24-hour bezel for tracking a second time zone. The Prospex Solar Diver (SNJ025) is the tool pick: 200m ISO-rated dive water resistance, solar H851 analog-digital movement with a six-month reserve, and a dive bezel. Owners praise the Seiko 5's bracelet and dial for daily wear; the Prospex is bulkier at 47.8mm and its silicone strap and plastic-heavy case divide opinion. Buy the SSK003 for a versatile automatic; buy the Prospex if you dive or want set-and-forget solar.

• Choose the Seiko 5 Sports SKX GMT if you want a steel automatic GMT for daily wear with a bracelet and a second time zone.
• Choose the Seiko Prospex Solar Diver if you need 200m dive-rated water resistance and a solar movement that runs for months without winding.