The Xbox One and PS4 share similar specs, but the devil's in the details | Ars Technica
PS4 UART Guide - Repair Wiki
Original PS4 design had 4GB RAM - GameSpot
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Sony Addresses PS4 RAM Report - Game Informer
Xbox One X vs PS4 Pro Specs (Leave Your Opinions Below!) :) : r/gaming
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PS4 Pro's additional RAM frees up memory for game developers - Polygon
Original PS4 design had 4GB RAM - GameSpot
PlayStation 4 Hardware Specs - PlayStation 4 Guide - IGN