Container + Divs vs Columns

Hi,
Is there any substantial difference between using for example 1 container with 2 divs vs 2 columns? The columns offer a much better set of tools out of box, like the vertical, horizontal or mosaic display which is great and also the grid format. But besides that, is there any difference in performance?

I am using a lot of columns because it makes the design website to mobile faster and more “pixel” flawless specially when using different sections.

So letting this out to make sure performance wise there is no substantial difference? Thank you very much.

Use the Grid - other than creating a mosaic structure it’s way more intuitive to use.