WOW or Final Fantasy 14?

I have been playing World of Warcraft for about a year and a half (85 pally, protection/holy), and in July Final Fantasy 14 will be released for the PS3. Since i have always been an avid FF player I was wondering if the new FF is as good as it looks? And if so should I leave the Warcraft behind? Please only answers from those who have played Final Fantasy 14 or both WOW and FF14.