Seiko Prospex Samurai SRPL15 vs Seiko X PADI Prospex 42mm Samurai Emerald Green Diver #SRPL53

Both watches are the same Seiko Samurai platform: 4R35 automatic movement, 41.7mm case, 12.3mm thick, 49.5mm lug-to-lug, 20mm lugs, Hardlex crystal, 200m diver's rating and 4,800 A/m magnetic resistance. The real differences are the finish and the look. The SRPL15 is a black hard-coated case at about 100g, so it wears lighter and hides scratches better. The SRPL53 is the PADI edition with an emerald-green gradation dial and a plain steel case, and it weighs about 170g. Owners of the Samurai line praise the case shape and the 4R35's reliability, but many note the movement runs within a loose factory tolerance and the Hardlex scratches more easily than sapphire. Buy the SRPL15 for a subdued, lighter daily diver; buy the SRPL53 if you want the PADI dial and don't mind the extra weight.

• Choose the SRPL15 if you want a lighter, blacked-out Samurai that hides wear and stays under the radar.
• Choose the SRPL53 if the emerald PADI dial is the reason you're buying and you prefer a plain steel case.