Svg help

Is there any way I can make the lions image look as good as the shield image? I know the shield image is a jpeg.

I do have eps and svg files but have no idea how to use them, when you open the green shield images you’ll see how good the quality is to the one with the winged lions I’m wanting the image with the lions on to look as good as the image with the green shield on is there a way to do this?

Best wishes,
Karl.