No one else is doing this stuff without sending your data off to a remote server. This is a crucial distinction, especially when it comes to personal data.

But apples implementation also sends stuff to remote servers.

"To run more complex requests that require more processing power, Private Cloud Compute extends the privacy and security of Apple devices into the cloud to unlock even more intelligence. With Private Cloud Compute, Apple Intelligence can flex and scale its computational capacity and draw on larger, server-based models for more complex requests."

For complex queries, yes, but everything they can, they do on-device. No one else does that, even if you ask ChatGPT what's 2 + 2 it'll go to their servers.