iPhone 15 Pro vs iPhone 12 Pro: Is the upgrade really worth it?

The iPhone 12 Pro and iPhone 15 Pro are two flagships with a three-year gap between their release. Is the latter phone worth upgrading to?

iPhone 15 review: I spent a month with Apple's base model and found it more 'Pro' than ever

iPhone 15 Pro vs iPhone 12 Pro: what has Apple changed in three years? - PhoneArena

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iPhone 15 Pro Upgrade Guide: See How It Compares to Older iPhones - CNET

iPhone 12 vs iPhone 15: Is It Time to Upgrade? - Tech Advisor

iPhone 15 Pro vs iPhone 13 Pro: Should you upgrade to the newest model?