ColourPop Sundae is a very cool-toned, medium-dark fuchsia with a semi-matte finish. It is a limited edition lipstick that retails for $6.50 and contains 0.11 oz.
ColourPop Sundae Ultra Matte Liquid Lipstick ($6.00 for 0.11 fl. oz.) is a brightened, medium fuchsia-pink with lighter violet micro-shimmer over a matte finish. This one was a surprise, as it is the only shade in the range with shimmer--like a matte frost, but the shimmer is very fine. It was mostly opaque, though some of the natural lip comes through, and it applies a little streakily. Luckily, it is such a bright shade that it distracts from any visible streaks. The color lasted for eight and a half hours with minimal, even fading while the shimmer seemed to travel slightly over time. It was slightly drying after six hours and then drying enough to want it off by the eighth hour. Tom Ford Beauty Electric Pink (15) (P, $50.00) is less shimmery, glossier. Tom Ford Beauty Justin (LE, $32.00) is lighter, glossier. Kat Von D Backstage Bambi (P, $19.00) is less shimmery, lighter. Kat Von D Lullabye (P, $21.00) is more shimmery, darker, less glossy. Kat Von D Sexer (P, $21.00) is more shimmery. Melt Cosmetics Shady Lady (P, $19.00) is less shimmery, darker, glossier. Obsessive Compulsive Cosmetics Yaoi (P, $18.00) is more shimmery, glossier. Too Faced Melted Fuchsia (P, $21.00) is less shimmery, glossier. Tom Ford Beauty Pablo (LE, $32.00) is lower quality, less glossy. NARS Michiyo (P, $32.00) is lower quality, less glossy. See comparison swatches / compare dupes side-by-side.
FURTHER READING: Formula Overview, which is a detailed review of the range as a whole.