
Omega
Aqua Terra 38
Ref. 220.10.38.20.03.001
$5k–$6k
Pre-owned: $4k–$5k
Complete head-to-head comparison
Comparing the Omega Aqua Terra 38 ($5k–$6k, 150m WR, 38mm) against the IWC Portofino 40 ($7k–$8k, 100m WR, 40mm). The Omega Aqua Terra 38 is the more affordable option by $1k.

Omega
Ref. 220.10.38.20.03.001
$5k–$6k
Pre-owned: $4k–$5k

IWC
Ref. IW356504
$7k–$8k
Pre-owned: $5k–$7k
Price
Water Resistance
Score
Repurchase
Pros
Pros
Cons
Community Verdict
Too Close to Call
Both sit in a similar price range: Omega Aqua Terra 38 at $5k–$6k vs IWC Portofino 40 at $7k–$8k — choose based on use case and style preference. Omega Aqua Terra 38 edges ahead on water resistance: 150m vs 100m. Case size: IWC Portofino 40 at 40mm suits larger wrists; Omega Aqua Terra 38 at 38mm is the more compact option.
Both are excellent watches with different strengths. The Omega Aqua Terra 38 offers a more compact size and costs less new. The IWC Portofino 40 excels in overall construction. The best choice depends on your wrist size, budget, and preferred aesthetic.
The Omega Aqua Terra 38 retails for $5k–$6k, while the IWC Portofino 40 is priced at $7k–$8k. Pre-owned, expect $4k–$5k and $5k–$7k respectively. Actual secondary market prices vary based on condition and demand.
The Omega Aqua Terra 38 has a 38mm case diameter with 11.1mm thickness, while the IWC Portofino 40 measures 40mm × 8.15mm. Both have lug-to-lug measurements of 45mm and 46mm respectively. Consider your wrist size and wear style when deciding.
The Omega Aqua Terra 38 is water-resistant to 150m, while the IWC Portofino 40 offers 100m. Both are suitable for swimming and snorkeling at their respective depths. For professional diving, verify the rating exceeds 300m and includes a screw-down crown.
The Omega Aqua Terra 38 uses a automatic Cal. 8900 with 55 hours power reserve. The IWC Portofino 40 features a automatic Cal. 35111 with 42 hours power reserve. Both offer traditional mechanical craftsmanship.
Omega and IWC both command strong secondary markets. Pre-owned pricing shows an estimated resale value of $4k–$5k for the Aqua Terra 38 and $5k–$7k for the Portofino 40. Condition, service history, and box/papers significantly impact resale value for both models.
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