Have had both. Still have Sailfish because the phone is cheaper.
Also I thought Ubuntu Touch would be discontinued and I no longer use Ubuntu on my desktop,
but an Arch-based OS.
Best thing you can do is buy a phone that’s most compatible to the OS.
So Fairphone 5 or Pixel 3a for Ubuntu Touch,
and Jolla 2 for the Sailfish.
Do not buy Pine64.
Pine64 is unusable.
If it does ship it with UT and Fairphone doesn’t, then yes.