Practically as upgradable and maintainable/repairable as the framework. They sell all of the components separately, and this runs a fully up-to-date coreboot and even esoteric linux systems get tested on it. It is a significantly better Linux computer.
The StarFighter has soldered memory, making it significantly less upgradeable than the Framework Laptop. (Star Labs also sells the mid-range StarBook with upgradeable memory.) The Framework Laptop also has the advantage of swappable port/storage modules. However, the StarFighter has higher specs than the Framework Laptop at a higher price, and Star Labs is Linux-first while Framework is Windows-first.
Well, it might be a better Linux computer when it ships. The StarBook Mk VI ran about 6 months behind schedule (pre-orders are still shipping now: https://support.starlabs.systems/status/f38fed83-e6a1-454c-8...) though so I wouldn't set your watch to it...