M1911 - were you referring to the holster above when you said this, or the MS Summer Special? If the above, am I wearing mine wrong? I have a similar holster for My Shield, and the clip fits over my Hanks Amish belt, so the only added thickness beyond the gun is a layer of kydex on either side. I have a Blade Tech for my 1911 with a similar layout to the Summer Special, and its loops definitely go under the belt, so I completely understand if that's what you meant. And yes, I plan to buy a couple hybrid holsters soon. These ones have been comfortable enough (privilege of being young and thin, perhaps?) so I've been focusing on building my ammo supplies before buying more holsters.
As long as the clip is opposite the gun, it is increasing the total depth from your skin to the outside of the clip.
That is true whether it is a clip, or flexible loops.
Now look at a Crossbreed holster:
See the placement of the clips? They are closer to your skin than the clips on that minimalist holster.