I keep mistaking the sister for that other red haired ho

Same and i just realized they have different eyes color (￣∇￣")

Same and i just realized they have different eyes color
(￣∇￣")

Aside from a diffrent eye colour:
Bitch - red eyes and hime cut hairstyle. Her hair colour is more ruby-like
Nilla - yellow eyes, her bangs are longer and uneven, her hair colour is more orange in shade