I suggest a simple test?
Make a test mix with just one sound panned hard left, then panned hard right. No reverb, echo or stereo image processing applied.
Check your ‘mix’ on various different systems.
There should be absolute silence from the unused channel. Anything else will indicate a problem in mixdown, some audio crossover between channels somewhere in your system.
If your ‘mix’ passes this test, then everything else is down to mixing skills, listening environment and use of plug etc
What is certain is that Ableton doesn’t somehow magically enhance panorama or image, neither does Cubase (configured correctly) corrupt it. But before you can get your mixes right, you must confirm that all is ok on the technical side
Good luck!
P