I’ve had 3 Tribute basses, 7 US G&L basses (and a few guitars), and a few Squier Affinity basses, too, since you’re drawing the comparison.
All 3 Tributes were solid basses. Never had any issues with reliability of the parts, stability of the neck, or anything of that nature. I would trust any of them as regular gigging instruments. In fact, my Tribute SB-2 was my main player for many years and never let me down.
That said, the weakest part IMO is the tuners. Again, I never had any issues. They always held tune, never broke, were easy enough to get accurate tuning, etc. but I will admit they they just don’t feel as solid as their US counterparts.
If the knobs feel cheap, it’s because they are. They’re the chrome knobs with the plastic push-on core. The US models use metal set-screw knobs. Just the weight of the knob can make a difference in the feel. The electronics are functionally the same, though as previously noted, tolerances aren’t as accurate and they do use a split-shaft knob to accommodate the push-on knobs.
The Tributes are definitely more solid than the Squier Affinities. And I say that as a fan of Affinities. From my experience, I’d put the Tributes more on par with a Mexican Fender. I do think the US G&Ls are definitely a step above the Tributes.