ColourPop Cheap Thrills is a neutral-toned, medium-dark purple with a semi-matte finish. It is a permanent lipstick that retails for $6.50 and contains 0.11 oz.
ColourPop Cheap Thrills Ultra Matte Liquid Lipstick ($6.00 for 0.11 fl. oz.) is described as a "dusty lilac." It's a muted, medium-dark mauvey lavender with neutral-to-warm undertones and a semi-matte finish. It looks a lot darker and cooler in tone when it dries down than it looks in the tube (I did a few double takes there). The texture was thin, almost watery, but applied smoothly and evenly with full color coverage. It dried down to a a transfer-free finish, but it had a slight sheen to it--it wasn't quite matte and had a very, very subtle tackiness to it for about an hour. The color lasted for six hours with a bit of color flaking more from the center of the lip. It was lightly drying over time. NARS Pussy Control (P, $27.00) is darker, cooler (85% similar). NARS Dominique (P, $34.00) is lighter, warmer, glossier (85% similar). ColourPop Lumiere 2 (P, $6.50) is darker (90% similar). Bite Beauty Thistle (DC, $26.00) is lighter, warmer, glossier (90% similar). Sephora Off-Limits (38) (P, $8.00) is cooler (85% similar). Anastasia Dusty Mauve (P, $18.00) is darker, more muted (85% similar). ColourPop Femme (P, $7.00) is darker, more muted (85% similar). MAC Rossy (LE, $20.00) is darker (90% similar). Makeup Geek Savvy (P, $15.00) is darker (80% similar). Maybelline Concrete Jungle (P, $7.49) is darker, cooler (80% similar). Kat Von D Ayesha (P, $20.00) is darker, cooler, less glossy (80% similar). Kat Von D Requiem (P, $20.00) is lighter, less glossy (80% similar). Sephora Taffy (P, $14.00) is brighter, warmer (80% similar). NARS London Calling (P, $26.00) is darker (80% similar). See comparison swatches / view dupes side-by-side.
FURTHER READING: Formula Overview, which is a detailed review of the range as a whole.