What’s the difference between all of the Dove beauty bars?

I notice that only the sensitive one is unscented and has glycerin in it. Does this mean that it’s more moisturizing than the others?

Most of the other bars have extracts and oil in them like this shea butter one has Butyrospermum Parkii oil. Does the oil have any benefits on skin?

Do the extracts and oils do anything or are they just there for the different scents? Are the dyes in the bars bad for your skin?

What about the anti-stress one with blue chamomile and oats in it? Would the oats be good at soothing the skin?