I have both the 5S+ and 5+ Sapphire Titanium and I see that the 5S+ has a bluish tint when backlight turns on. The 5+ doesn't have this issue at all. Maybe because, the Sapphire glass on the 5+ is blocking the bluish tint? Did anybody noticed this?
I've the option to swap the 5S+ regular glass with Sapphire glass.
Your input would help me to go with Sapphire on the 5S+ if need be.
Please advise.