If they don't give the same results, it won't be interpretations: you'd have two competing theories and one of them will be wrong since it can be ruled out experimentally.

This is also why majority of physicists don't care much about such philosophical aspects. You can argue that they should, are there are a few people working on foundations of quantum mechanics, but most physicists (including me) see it as semantics and choose to spend their time on practical physics. At least that's what my field (condensed matter physics) is about, which also encompasses the realization of these quantum computers. You can't change the conductivity of a material, or the measured charge state of a transmon qubit by using a different interpretation.

Sorry, no. Bell experiments do produce different measurements for different interpretations thus ruling one of them true. As it stands now they seems to confirm Copenhagen for pretty much everyone.

https://www.informationphilosopher.com/solutions/scientists/...

"Ensemble interpretations of quantum theory contend that the wave function describes an ensemble of identically prepared systems. They are thus in contrast to “orthodox” or “Copenhagen” interpretations, in which the wave function provides as complete a description as is possible of an individual system."

Bell experiments seems to almost everyone to rule it out, while myself unfortunately, as i really want to wholeheartedly jump on magical bandwagon of superposition and quantum computing, see gigantic holes in those experiments which allow all those other, compatible among themselves interpretations - local realism, pilot wave and ensemble - in and actually pretty much rule Copenhagen out.