In real life when I look at Mac Tan it looks darker compared with UD Toasted, but when I swatch it's lighter than UD Toasted.
Here is the pictures :
Mac Pigment Tan
Compared it with UD Naked Palette in Toasted
From left : UD Half baked, Mac Tan, UD Toasted
From left : Mac Tan, Ud Toasted with flash.
More closed up! Looks like Mac Tan (left) reflect shiny with flash.
From left : Mac woodwinked, Mac Tan, Ud Toasted. Bottom : Inglot P 406. Taken with flash.
More closed up without flash.
Hope this help you to decide what you like to buy from those eyeshadows. Have fun!