I had major overchoice anxiety on their website. Why do they need to create 20 e-readers looking nearly identical? And why are color ones cheaper than the black

I had major overchoice anxiety on their website. Why do they need to create 20 e-readers looking nearly identical? And why are color ones cheaper than the black and white ones? https://us.kobobooks.com/collections/ereaders https://us.kobobooks.com/collections/ereaders