Well it’s really hard to compare antennas in the attic, reception can vary quite a bit just by moving the antenna literally one inch.
Do you know what material the insulation is? Some include metal foil.
A bad antenna on the roof is likely going to be better than good antennas indoors.
I suppose you should also try running fixed gain settings.
Try 44 on the ProStickPlus as a start.
With the normal stick without builtin amplifier it’s probably best to leave it at -10.
You could also check if terrain is blocking you: What is the Maximum Range I can Get?