Yugabyte is different DB technology than postgres but with PG compatibility layer, means you can use existing postgres query/application, the rest is different

Yugabyte is different DB technology than postgres but with PG compatibility layer, means you can use existing postgres query/application, the rest is different beast. This one is more comparable with citus, an PG extension. Meaning it runs on top postgres. However from their github page they also offer patched version of PG which I suppose offer some tighter integration with the extension.