Hey Johnny, you have both the G6 and S8 right? Let me ask ya...
OLEDs always have the rep of the best blacks... the 'inkiest' black and I can see that and in full color pics, the S8 screen just POPS if you do a side by side with G6 even though the G6 is no slouch... full color high detail are amazing... maybe more true to color type look to it compared to the poping colors on S8.
But what is your opinion comparing whites on the S8 and G6 or even i7?
Every time I do a side by side of a S8 and G6, the only thing that bothers me is when you do a side by side (I'll bring up the messaging app to get a white background to compare)... G6 white is WHITE WHITE... and the S8 always just doesn't look as white. Just seems it has a hint of red or orange or something... like a dull or like an antique white. :-\
I've gone to many different stores... BBs, AT&T stores... always a side by side, demo vs demo... and the whites on the G6 are just whiter.
Do you see that also with your phones?