They may have more square footage, pools, warmer climate during summer, more parks for children/pets, better schools in some areas as mentioned. That's part of

They may have more square footage, pools, warmer climate during summer, more parks for children/pets, better schools in some areas as mentioned. That's part of why I'd prefer living on the peninsula than in downtown SF. Weather is consistently better in the summer months. More space/less people (except for rush hour traffic). More parks for recreation. Pools aren't necessarily a deal breaker for me, but it's a nice extra. A shiny high-rise is nice but unless you can afford a penthouse or similar you're probably looking at a small unit. Less space, fewer parks, more people everywhere (tourists, homeless, etc.)