Help with possible sun scorching

[cameracassidy]

I have a few questions about some succulents I've been growing lately. I'm wondering if they are getting sunburned? They are in a south facing window well that gets light for about 5 hours in the afternoon. Some of the plants look like they aren't getting enough light and some possibly too much but they all receive about the same amount. I've included some images to show what I mean. Any thoughts?

The plant on top has some black spotting on the leaves, it's a little hard to tell from the photo.