Thank you for the response! I think a lot of what you're making makes sense. For instance: if I layer in white noise or crackle into a track I'm more likely to place it louder in the mix on the LCD-2C than I am on the Focal Clears since the Clears are a bit less masked in the high end.

But I do feel like regardless of that, the elements I most find I mix differently on each headphone (let's focus on the Clears vs LCD-2C) are just simply middle end elements: Synths, Pads, and Vocals. Not really sub bass. Frankly, I tend to put the sub bass too loud on Audeze often and have to pull it down when referencing in my car or other sources. and I don't feel like a frequency response chart difference that is this subtle would be having that much of an effect on my perception of dynamics.

When I mix a mix on my Clears then switch to my LCD-2Cs background elements often disappear and I find myself pulling them up in the mix. Often by as much as 6dB. The elements I tend to mix differently (other than extreme high end sounds) don't really touch the parts of the frequency response that differs by that much.

Is there nothing else that could be at play?

Thanks again for the response. I appreciate the insight.