Gateron Red Ink
The red ink unlubed is a bit too high pitched to my liking. They also are a lot scratchier than the unlubed black inks. I added some Krytox 104 and the sound became a lot deeper. I still enjoy the lubed black inks more, but I tend to favor the heavier actuation and bottom out.
Gateron Yellow Ink
The yellow ink unlubed has a nice solid sound on its own, and the feeling is 1:1 how @Walkerstop described in his typing test of them. I really agree that with lube these switches sound and feel amazing, whereas beforehand they only feel good.
I wish I had grabbed some Blue Inks as well but I can always do that later. I really think (just like the Black Inks) that these are solid linear switches on their own, and provide excellent color options for people who are wanting every part of their board to match. Looking at you Jamon owners.