I don't know if paler is the right word, and those who've been following the "iPhone 12 warm" threads would know it's hard to get the difference to show in photos. But there is a difference for sure.
Here's a picture at an angle, I suppose this shows it a bit better. Also remember, what you're seeing in these pictures (or what may seem more white to you) depends on the screen you're viewing it on. To my naked eye S5 is "more white", but that could also be because that's what I've been used to for all these years.
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