It depends on your goals. If you donate to the GNOME Foundation, your donation won't help develop Phosh (which is the leading mobile Linux interface according to 3 different PinePhone user surveys) and it probably won't be used to make GTK/GNOME ecosystem become adaptive and mobile-friendly. If your goal is to advance mobile Linux on the GTK/GNOME/Phosh platform, then ordering the Librem 5 is the best way to get funds to the 10 software devs working on it at Purism. See:
https://source.puri.sm/Librem5/community-wiki/-/wikis/Freque...I own both the PinePhone and Librem 5 USA, and I'm seriously impressed by the amount of work the Purism devs do for PinePhone users (who are the majority of the Phosh users).