This is an expert, head-to-head comparison of two watches that represent fundamentally different philosophies: the rugged, accurate "grab-and-go" quartz tool watch aesthetic versus the sophisticated, ultra-thin mechanical dress watch.

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Head-to-Head Comparison: ADDIESDIVE vs. SEAGULL

The most significant difference lies in the movement: the ADDIESDIVE uses a highly accurate, low-maintenance quartz movement with a sweeping seconds hand, while the Seagull uses a true automatic mechanical movement, which is the heart of its ultra-thin, premium design.

Summary Table

Feature	ADDIESDIVE Christmas Gift 36mm Men‘s Watch VH31 10Bar Waterproof BGW9 Luminous 316L Steel Bubble Mirror Glass Quartz Watches	Seagull Watch Couple Automatic Mechanical Watch 30 Metre Waterproof Man Watch Calendar Women's watches 36 mm 40mm Clock 1087
Movement	Japanese Quartz (Seiko VH31)	Chinese Automatic Mechanical (Seagull ST18)
Movement Type	Mecha-Quartz (Sweeping Seconds)	True Automatic (Self-Winding)
Case Material	316L Stainless Steel	18K Gold-Plated 316L Stainless Steel
Crystal	K1 Mineral Crystal (Bubble Convex) or Sapphire in some variants	Synthetic Sapphire
Water Resistance	100 meters (10 Bar) with Screw-Down Crown	30 meters (3 Bar)
Case Diameter	36mm	36mm (Women's) / 42mm (Men's)
Case Thickness	Approx. 11mm - 12mm	Approx. 9mm (Ultra-thin)
Luminosity	BGW9 Super-LumiNova (Bright Blue Glow)	Minimal to None (Typical for a dress watch)
Key Feature	High accuracy, smooth seconds sweep, high water resistance.	Ultra-thin profile, high-beat mechanical movement (28,800 bph).
Approx. Price	Entry-level budget (Sub $100)	High-end for Seagull (Pricing for Gold-Plated model found at $1,809.00 USD)

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In-Depth Comparison

1. Movement and Performance

Feature	ADDIESDIVE VH31	Seagull 1087
Movement	Seiko VH31 (Sweeping Quartz)	Seagull ST18 (Automatic)
Accuracy	Extremely high (±15 seconds per month)	Standard mechanical accuracy (will lose/gain a few seconds per day)
Maintenance	Very Low (Battery change every 2-3 years)	Higher (Requires periodic servicing)
The 'Sweep'	Quartz-driven sweep (4 ticks per second), mimicking a mechanical watch.	True mechanical sweep (8 ticks per second), a signature of the high-beat ST18.

Analysis: The ADDIESDIVE VH31 offers superior, no-fuss accuracy and reliability. The VH31 is a "mecha-quartz" movement that combines the accuracy of quartz with a smooth, sweeping seconds hand, a desirable feature usually reserved for mechanical watches.

The Seagull 1087 offers the traditional "soul" of watchmaking. The ST18 is a high-grade, high-beat (28,800 VPH) automatic movement known for allowing a thinner case profile. This movement is more engaging but requires regular wear to stay wound and will be less accurate than the quartz alternative.

2. Construction and Durability

Feature	ADDIESDIVE VH31	Seagull 1087
Water Resistance	100 meters (10 Bar) with screw-down crown and case back.	30 meters (3 Bar) (splash-resistant only).
Crystal	Domed K1 Mineral Crystal or Sapphire (check variant).	Synthetic Sapphire.
Case Finish	316L Stainless Steel (Brushed and Polished).	18K Gold-Plated 316L Stainless Steel.

Analysis: The ADDIESDIVE VH31 is the clear winner for robustness and daily wear. Its 100m water resistance rating and screw-down crown make it suitable for swimming and all-weather use. The mineral crystal, while more prone to scratching than sapphire, is usually tougher against shattering.

The Seagull 1087 is designed as a delicate dress watch. Its 30m water resistance means it should only be exposed to light splashes or rain. However, it boasts a harder, more scratch-resistant Sapphire Crystal and an elegant 18K Gold-Plated case.

3. Aesthetics and Unique Features

Feature	ADDIESDIVE VH31	Seagull 1087
Lume	BGW9 Super-LumiNova on hands and markers (excellent for low-light visibility).	Minimal or No Lume.
Case Style	Versatile, small-sized tool/field watch aesthetic with a vintage-style 'bubble mirror' glass.	Ultra-thin, classic, high-luxury dress watch aesthetic.
Pairing	Single men's model (36mm).	Couple Set option (36mm for her, 42mm for him), offering matching high-end watches.
Thickness	Average slimness (11-12mm).	Exceptional slimness (~9mm), which is a mark of a superior dress watch.

Analysis: The ADDIESDIVE VH31 excels in functionality. The BGW9 Luminous material is a high-grade feature that provides a strong, blue glow in the dark, making it highly legible.

The Seagull 1087 is about prestige and elegance. Its ultra-thin profile and ST18 automatic movement—which allows for that thinness—make it a true dress watch. The option for a couple's set in a gold-plated case is a key aesthetic differentiator.

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Who Should Buy What?

Choose the ADDIESDIVE Christmas Gift 36mm Men‘s Watch VH31 10Bar Waterproof BGW9 Luminous 316L Steel Bubble Mirror Glass Quartz Watches if:

• You prioritize ultimate accuracy and convenience. The sweeping quartz movement provides near-perfect timekeeping with a low-maintenance, "grab-and-go" battery.
• You need high durability and water resistance. The 100m rating and screw-down crown make it safe for swimming and active use.
• You want excellent low-light visibility. The BGW9 lume is a significant practical advantage.
• You are on a strict budget. The Addiesdive offers incredible specifications for its price point.

Choose the Seagull Watch Couple Automatic Mechanical Watch 30 Metre Waterproof Man Watch Calendar Women's watches 36 mm 40mm Clock 1087 if:

• You value the art of mechanical watchmaking. The high-beat Seagull ST18 automatic movement is a sophisticated, traditional engine.
• You need a true, ultra-thin dress watch. The ~9mm thickness is significantly thinner than the Addiesdive and perfect for slipping under a cuff.
• You are looking for a luxury aesthetic and material. The 18K Gold-Plated case, Sapphire crystal, and couple's set packaging offer a premium, matching gift option.
• Your primary use is formal or office wear, where water exposure is minimal.