From Apple's website: "we don’t need to know a lot about you to deliver a great experience on Apple Maps." -> so you still need to know a little about me ? "Even if you choose to sign in, Maps keeps your data in sync across all your devices using end-to-end encryption — so where you go isn’t associated with your Apple Account at all." -> looks like magic, data is synced accross all your devices but without using your…
The difference is in how the data is handled. One is using it as an asset to update the FBI-like file they have on you. The other is treating it like a hot potato.