Overall I'd say that nyx pinched is closest to nars deepthroat in color and finish. Mary Kay's pink mirangue is similar in color but has a matte finish. As for nars orgasm the closest is sleek's rose gold hands down.
From top to bottom the swatches are 1)Mary Kay pink mirangue 2) milian corallina 3) blush with no name from Sonia kashuk palette 4) elf blush/ bronzed duo 5) elf candid coral 6) nyx pinched 7) nars orgasm 8) sleek rose gold 9) nars deep throat.
I'd even say that sleeks rose gold is more pigmented and gives you a better color pay off, and the pan is also much larger. Here are some more swatches in natural light and with flash:
Hope this helped!