Call me crazy but just used 10% and $50 edu discount to get the 256gb 2015 model for $1400 after tax.
Had to try this force trackpad, potential 4k output possibility (though I won't be able to try that for a while, I have a 1920x1200 monitor currently) down the road, and Yosemite/alleged better battery life, and double IO before my 2014 refurb return policy is up, just to know. Price difference of $178 from refurb 8/256 to the new model. Might be worth it if I can cope with Yosemite only (we'll see)
Comparison between A02A left (2015) and A018 (2014). They're kinda close is my initial impression, the 2015 is warmer and I can't tell if the menu shade changed from Mavericks or not but its at max brightness/default profile/
for educational purposes:
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Hmmm i think I prefer A018, its brighter and purer looking side by side but A02a isn't bad, and still nothing like the A020 I had on my previous refurbished 2014. And looks better than the demo A02a that was on display at the store.
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using the 2015 by itself it definitely appears to be a nice panel too. I don't think I could go wrong either way.
ran IR checkerboard test for 20 minutes (just to be certain), no faint trail of it AT ALLat least of the three total (2x 2014, 1x2015) none have exhibited IR. its good they nipped that in the bud. Gonna give credit where its due.
Running black magic on my 256 samsung drive (again 3 for 3) I get roughly double the io of my 2014. Dang, thats badass!
http://i.imgur.com/1iepSPg.jpg zoom to your hearts content, its the full size from what came off my 6+. I'd say thats representative of in a decently well lit room.
That's not a bad 2015 display at all. I'd be pretty happy with that. In fact I cannot see anything wrong with it at all.