Both eyeshadows have good pigmentation and are very pretty and wearable.
MAC's Club is a very pretty satin red-brown with green pearl. It reads as a teal to rust shift.
Maybelline's Quad in #400 Olive Martini also has a similar shade (3rd from the left) but more shimmery than satin. It reads much warmer with more maroon/rust than teal.
Maybelline's (Left) & MAC's Club (right)
I love both shades and hope you do to!