There are two major philosophical differences between Google and Apple which led to this outcome.
The first is the difference in business model, i.e. advertising versus whole-product.
The second is that Google starts with a permissive ecosystem mindset and locks stuff down as they go along; Apple starts with a conservative mindset and opens stuff up as they go along. Neither approach is inherently better than the other—the competing platforms are converging towards equilibrium—but Apple's approach does prove to have the upper hand when it comes to consumer privacy.
The first is the difference in business model, i.e. advertising versus whole-product.
The second is that Google starts with a permissive ecosystem mindset and locks stuff down as they go along; Apple starts with a conservative mindset and opens stuff up as they go along. Neither approach is inherently better than the other—the competing platforms are converging towards equilibrium—but Apple's approach does prove to have the upper hand when it comes to consumer privacy.