it's the nature of mono and stereo.
I have a hunch, that those producers are utilizing techniques that i've described above. So their reference point when mixing, is more of both worlds.
If you only think of things, or do things, in a certain manner all you have to go off of is that one way.
If you hybridize your reference, then you can see what works well in both environments and end up with a decent mix.
You could how ever, specialize in one way of doing things.
If you're interested in having your tunes played out in clubs, look to see what the liver venue reference is (should be mono or stereo depending).
So, once you've understood where other people are coming from, then you might have a better picture (your song) to frame (stereo/mono/hybrid).
Also, you might be looking at a brush stroke, rather than how the brush stroke is involved with the entire picture, within the entire pictures.
Also, it's not that it's loosing power, it's that you've lost the stereo image of the song/sound. So you can't realistically expect to garnish the same results when you deliberately switch how the music is played back.
It ultimately sounds like, it's a mix issue. Look up fletcher munson curves or the thread in this forum (in this topic) about achieving loudness.
There's ways to MAKE THE MIX, louder based on how you bias your frequencies, levels, panning, and stereo imaging (width control) as well.
I don't play by those rules, but the professional mix engineers and masters do.
If you're interested in a very basic and fundamental understanding of what i've talked about, we can set up a skype meeting (some time after finals) if you're interested. no cost of shenanigans lol