You will not have a “true” stereo image since both the left and right side will sound different.
Joe describes the issue in his first comment:
Running stereo in a setup where both amps have different settings or drive structures is not recommended. I understand many users wish to layer the sound of two amps live to sound better but whenever you introduce tonal disparities at the output (the speaker), the image ceases to truly be optimal for stereo audio. Think of listening to a mix in a studio but one monitor is setup with a different frequency response; we just don’t do that.
You could try it, and if you like how it sounds, then use it that way.
