We take a close look at the key differences between the Pixel Watch 3 and 4—comparing everything from design and performance to battery life and new features—to help you decide whether it's worth upgrading to the latest model or sticking with the previous one.

Alphabet’s (GOOGL.O) Google introduced on Wednesday a new lineup of Pixel smartphones and gadgets, intensifying its efforts to embed artificial intelligence across a wide ecosystem of products.

Google's Pixel Watch 4 has arrived with a sleeker design, better battery life, first-of-its-kind emergency satellite connectivity, and an AI-powered health coach, giving even the most established sma...