It's simple, both SVG and CSS are totally different things, and it's kinda silly to compare them (don't consider my previous comment ^^). The article simply go

It's simple, both SVG and CSS are totally different things, and it's kinda silly to compare them (don't consider my previous comment ^^). The article simply goes from "Hey, CSS3 gradients are crap" to "look how awesome is SVG at things". Blah and bleh. I'd sugest to check the wikipedia page or proper documentation for both of those two, you'll get a better definition than I can give. Cheerio.