Got the Genesis Lab Angie head (rare). When I use the milk HUD, it looks the same as the vanilla tone. And the neck is like this, even though I'm using their Maitreya applier. https://i.gyazo.com/3b6490b238288d355ff4648e27541cf7.png
It's very frustrating and sad because their heads are so lovely, but as soon as they encounter something else - body, hair, whatever - it ruins it. Plus the ear skin tones never match the heads.
To be honest, I don't know. I've used the Chloe head for some ads, and since it did fit with the styling of the avatar, I used a necklace to dissimulate/hide that line.