I think the biggest change a 285 gives is full Freesync support for the new displays coming out. Before that you needed 290 and above?
So given its price point and how well Freesync could give to low frame rate I say it's a very nice GPU on the mid range to have.
But compared to the 280 which has slightly better specs and more VRAM, I know which I'd go for
![Wink ;) ;)](/styles/default/xenforo/vbSmilies/Normal/wink.gif)
But yeah, I believe it basically has Hawaii features on the Tonga GPU