Do you want to style your SVG with CSS code? Use SVG.
Do you want to support IE8 or other browsers that don't support SVG? Use OBJECT.
Do you want to interact or animate your SVG? Use SVG or OBJECT.
For more information about SVG, please read this article: http://www.smashingmagazine.com/2014/11/styling-and-animating-svgs-with-css/