Resize Cursor – Col/Row vs East-West/North-South

I have a website with 2 panels. The user can resize these two panel using drag-n-drop.

I want to change the mouse cursor, when the mouse is hovering over the edge of these two panels, to a Resize-Cursor.

However, I've noticed that there are two types of cursor icons for resize (for both vertical and horizontal).

Cursors East-West (aka ew) and North-South (aka ns):

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Cursors Col and Row:

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What is the difference between these two pairs of icons, and when should I use each one of them?

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