Hey! Just received my replacement Retina baseline with 16GB RAM. Still currently have the original one. (Rattling sound and bad creaking issue) Apple were very good at replacing this. My concern now lies with my replacement. I have noticed a couple of things, I'm not sure if whether this is just me being paranoid. I can keep both until next week so will have to use the new one a little more. I have noticed the screen appears to be yellower and not as crisp as the original. I believe this could possibly be the adhesive and it may possibly fade? What do you suggest? it appears as though it was only manufactured on Monday. I have also noticed the manufacturer of the RAM to be a different number. In benchmark tests this machine doesn't achieve as strong results as the first one. Not a huge difference talking very small difference, why would this be? (We're talking an average of a test run multiple times). Coconut battery also reports the machine to be using less power than the original. Not a bad thing obviously They both have the same software, with the new one simply being a migration of a time machine backup.