Orca slicer Overhang Speed classic mode

Maybe someone can say something about it. dont know where to ask.
in Orca Slicer i see it every time and ask myself what this changes. cant see any changes in preview section.

Screenshot 2024-01-12 163836

This will show you how it affects the overhang degree angle and speed you will have to look at other overhang shapes to see the effects it will do.
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Classic Mode Off

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Classsic Mode On