They're both great. LOADS of Belgians use Styrian Goldings, which is not actually a type of Goldings, but is a Fuggle grown in Slovenija. If I were making Belgians I would opt for Styrian Goldings myself but they're both fantastic hops. EKGs are earthier, Styrian Goldings are more like Fuggles, floral etc. I had a beer in Slovenija about a month ago that was a heavily hoppy beer with Styrian Goldings and it was fantastic.
I had a bunch of beers at the Great British Beer Festival that used Styrian Goldings too. I like to have both on hand. If you're familiar with Fuggles, use Styrian Goldings as you would Fuggle. They're not exactly the same but in the same family.
You can find more info on these and other hops here:
ProBrewer.com: Hop Data