The RX100 III (2014) added the two things the first models lacked: a pop-up OLED viewfinder and a 180° flip-up screen, plus a brighter 24-70mm f/1.8-2.8 Zeiss lens with a built-in ND filter. A 20 MP 1-inch sensor, 1080p video; a good, small travel camera even now.
Select up to 2 cameras to compare against the RX100 III. It's always pinned as the baseline.
Base score — computed from verified specs for an enthusiast shooting photo and video. Camera Match adjusts it for your skill level and priorities.