I haven't posted pictures of my cats for almost a year, and they were kittens then. So I found them like this a few hours ago and decided that pictures were obligatory (sorry for the massive size):
Inkie on the right and Penny on the left.
Yes, I struggle to tell them apart.
They're sisters from the same litter, probably identical twin cats. I can just about tell which is which because their fur is ever so slightly different and I think their eyes are slightly different shades.