I’ve got a 2012 and 2014 15” rMBPs. Indeed, about 6 months into owning the ’12 image retention was showing itself. I walked into an Apple store, had it back in two days with a Samsung display (original was LG). I’m typing on it right now (the 2012, 2.7/16/786).
I’ve never had any issues with my 2014.
I pay my mortgage and have for two decades doing audio, video, and still photography work in Alaska. My ‘eyes are trained’ too. These are the best damned displays on the market out of the box, period. ASUS, you’re definitely NOT going to get the same quality you’re going to with a new rMBP. Apple was first with HiDPI displays and have been building them now going on 4 years. Sure, there’s gonna be a ‘bad apple’, don’t pardon the pun....when you sell a dozen million a quarter but it’s irrelevant where you buy your MacBook, Apple will always fix it for you free of charge.
Have you ever dealt with ASUS’s customer service? I’m not even sure it exists. You’ve got a year to decide after you open the box, regardless of buying from a reseller or an Apple store, online or eBay. If it’s a legitimate machine, you’re fine. Why in the world did you return your 2012? Why not have it fixed? I’m still smiling, every time I turn it on. It’s not as quick as my 2014 reading and writing data ...with the latest PCIe SSD solutions, but it’s fast as hell and the perfect laptop to manipulate my photos, finalize my videos, and enjoy surfing the web, checking Twitter, FB, or working in Xcode.
Not sure why you’re so argumentative, just open the damn box. Turn it on, and enjoy it. You’re not going to get the same experience in ANY ASUS laptop, guaranteed.
If you’re looking for an excellent review on the latest or older archived rMBPs, check out Anand and quit ‘looking for problems’. You’ll find that most of us that own these $2500+ (your case $6k? come on now...) aren’t about to subject our computers to some goofball site that can’t guarantee me their pattern will destroy my display. If you’d like why don’t you do the ‘checkerboard’ test --- that has absolutely nothing to do with photography!!!
Calling someone a smart ass that’s trying to help you isn’t the best way to get help. You’ve made up your mind apparently, as the thread you’re linking is a couple days of reading...and built over the course of nearly four years. That’s silly. Just don’t worry about it. That’s the silly part... Why in the world did you even buy it?