I'm comparing my experience to prior phones, like the S6 I tried in a store and my wife's S7. Whenever I compare whites on them to mine, it's no contest which was more "white," and that's my biggest concern. I compared the LG V20, G4, and HTC One M8 to AMOLED flagships out at their respective times.
Just as an example from that, the G4 and M8 are both listed on this chart with some of the other phones out at the time of the G4's review:
So the most accurate device of that period, on the sole measurement of white accuracy, was the iPhone 6 (small one), which was nearly perfect (.17% deviation) - but the S6 Edge was only .05% further away from perfect than the iPhone 6. The Note 4 and Nexus 6 also did great despite being AMOLED, while the M8 was 12.5% away from perfect, compared to the Nexus 6 (which was widely talked about as having a horrible display) at 4.5% away from perfect. The G4 was 17.45% away from perfect.
Not to single out only this one measurement though, the G4 does terrible on all metrics for display, not just white point. It's bad at GMB, Saturation Accuracy, Grayscale Accuracy, White Point, etc. It does do okay at max brightness and contrast ratio, for an LCD, obviously something that AMOLED displays are naturally better at.
I think this is one of those cases where some people prefer warmer or cooler displays and it's coloring the perception, pun not intended. A lot of people prefer really terrible displays, but in terms of what is actually most accurate, there really isn't a rule that LCD or LED does better by default. It's all about the calibration.