I have both, I use C-Thru every day. To be honest, Myth turns up a little more peachy-toned than beige. I like Myth, but it looked a little pasty on my lips with C-thru over it (Since C_thru, or at least my tube, is a bit thick, as is Myth).
i got it, it looks really nice w/ c-thru. thanks girlies! haha my friend tried it on too, it was a little pasty on her. but i'm so pale that it works it doesn't wash me out haha.