So after the first day #PineTab:
#UBPorts is not my first choice (could not poweroff on first boot, had terrible fontrendering, etc.). It's not my favorite.
I can't boot from sdcard as I get no video-output when booting from sd. Don't know why.
#Mobian with #Phosh is early alpha to me. Apps are not optimised for the display. It boots in portrait. Rotating the screen (not by sensor, just software) rotates in wrong direction (so upside down). Keyboard touchpad not working. No Audio-output.