PS4 pulled down by lack of supply while the XBO got boosted by Prime Day sale on Amazon, hence why PS4 is on the third place in the US this week, behind Switch and XBO
Ah, you meant for Xbox One. I thought you meant for PS4 for both, lol. Though, was there a lack of supply of PS4? I did see Xbox One was very high on Amazon Prime day because of the sale, but PS4 wasn't sold out the time I looked at it.