How much better is a R9 FURY than a R9 390 @1440p

[utopia0]

I got my 1440p moniter and the preformance at 1440p with a r9 390 is underwhelming. the r9 fury is 300$ on newegg so i was wondering how much better is a R9 fury than a R9 390?

 

[ajpaolello]

http://www.tweaktown.com/reviews/7241/sapphire-tri-radeon-r9-fury-video-card-review-hbm-water-cooler/index7.html

Seems like a bit of an improvement.