I'm glad I've started this argument. Good to see both sides back and fourth to help so that both sides are really not all that different from each other in the end.
I love the 4GB VRAM argument although it's kind of invalid at this point as it was proven that even though the last .5GB was slower, due to the cards resource management have virtually 0 affect in real life other than the poorly written benchmark software.
Also G-Sync vs Free-Sync is a classic example of the real reason why Nvidia is looking down Geforce experience and their drivers under accounts. If you look at the recent history of Nvidia and AMD what do you see? Typically what I've been noticing is a big announcement of Nvidia releasing a new series of cards. They detail out the chipset to give us a good idea of the performance. Soon after a few weeks before release AMD tends to announce their "competitive" card which barely meets Nvidias performance expectations yet tends to use a literally shit ton more power to accomplish the same number.
This has been the case for years, with all aspects of their tech. G-Sync is announced. Gets released as dev kit, get huge praise as being the best tech, then Free-Sync is announced. Same case with TressFX and Hairworks, same case with Tessellation. Sometimes AMD comes with a response that's good sometimes NVIDIA takes the cake.
None of this would look more obvious as it did with the 980 and Titan X. Nvidia didn't expect as impressive numbers from the new chipset as they thought. Everyone expectated a 780Ti in performance, so AMD comes up with the 390X. It gets completely blown out of the water by the 980 because no one expected getting 20% better performance than a 780Ti from it. So AMD panics and releases the details on their new hardware the Fury X which just meets the 980 in performance. Now the 980Ti comes out and RIP AMD its about 15% faster than it. Now AMD is spent until the next Tick cycle.
How is this relevant. Well, Geforce experience gets huge praise. So AMD go ahead and releases their own version of it. Now Nvidia is like fine, we will start putting up bigger walls.