The ASUS Tinker Board is a compelling upgrade from a Raspberry Pi 3 B+
I think the main issues with all of these rasbi alternatives is the software. As ... quirky ... as the rasbi is, the software support and optimisation is excellent. There are several speed comparisons on youtube where the rasbi beats a lot of the competition through sheer software optimisation. Honestly, without complete Upstream Kernel support and Open Sourcing of all necessary drivers, none of these Boards is really useful.