It also has worse privacy because it uses Google services for things like DNS and NTP by default, which can not be changed by the user. GrapheneOS replaces all Google services like DNS, NTP, connectivity check, and the Attestation key provisioning service through either their own service or their own proxy for the Google service. Most of these can also be entirely disabled by the user on GrapheneOS. It also offers proxies for SUPL and PSDS location services and allows the user to disable these.
App compatibility is worse, as LineageOS uses microG whereas GrapheneOS uses Sandboxed Google Play services. microG is an insecure and poorly implemented version of Google Play services that sometimes has issues with basic Google SafetyNet checks. GrapheneOS just uses the standard Google Mobile Services bundle, but it’s not installed as a system app and has the same privileges as any other app. It can be installed and uninstalled by the user and all permissions can be revoked (including network and sensor access).