Pinetab much better IMO. Plus you can choose between arm and RISC-V.
Discussion
Not tried the Pine. StarLabs options looks decent
In comparison to purism starlabs hardware is superior, but their version of coreboot needs more development. In the end pine64 wins because lower price=more users, and you end up with many skilled users reverse engineering this and that, and writing open firmwares and better support for multiple OS'es.
Pine64 is great for tinkering and software development. Own a pinephone for testing purposes. But hardware is often pretty low but open.