Falcon Smash Turn Skid Comparison
This gfycat shows the varying distances Falcon skids when performing smash turns from different movement options. This is mainly for pc drops. The top 2 Falcons dash back by hitting back for more than 1 frame, but they still skid for a small distance before they move back. The 3rd and 4th Falcon only smash back for 1 frame, and so perform an empty turn (pivot) and skid much further.
Although this gfy is of Falcon, the concept is very general and Falcon is very much an extreme case, where his Dash is much better than his Wavedash, and yet Wavedash produces more skid.