Logitech MX Keys S vs Logitech Signature Slim K950

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MX Keys S compared with Signature Slim K950

	LogitechMX Keys S	LogitechSignature Slim K950
Overview
Released
Released	June 2023	March 2024
Typing
Layout
Layout	Full size	Full size
Switches
Switches	Scissor	Scissor
Key travel
Key travel	1.8 mm	1.8 mm
Backlight
Backlight	White	None
Automatic backlight
Automatic backlight	Yes	–
Keys labelled for
Keys labelled for	Mac, Windows and more	Mac, Windows and more
Touch ID
Touch ID	No	No
Switches
Switches	Scissor switches with 60 g actuation force, rated for 10 million keystrokes (function keys 5 million)	Scissor keys with 60 g actuation force and 1.2 mm actuation distance, rated for 10 million keystrokes (function keys 5 million, arrow keys 3 million)
Key travel
Key travel	–	1.8 mm total travel
Keycaps
Keycaps	Spherically dished keys shaped for fingertips	Slightly scooped, laptop-style keys
Layouts
Layouts	English UK, English International, Belgian, Croatian/Slovenian, Czech/Slovakian, Danish/Norwegian/Swedish/Finnish, French, German, Hebrew, Italian, Portuguese, Spanish, Swiss, Ukrainian (UK store); MX Keys S for Mac in English UK, English International, French, German and Swiss	English International, Danish/Norwegian/Swedish/Finnish, French, German, Italian, Spanish and Swiss (UK store; English UK listed as not available)
Backlight
Backlight	A hand proximity sensor turns it on and an ambient light sensor sets the level; seven levels; stays off in bright rooms and below 10% battery; duration and brightness adjustable in Logi Options+	–
Special keys
Special keys	Dictation, emoji and microphone mute/unmute keys in the F row; Easy-Switch keys; Fn + Esc swaps media keys and F-keys; legends for both Windows and Mac (a Mac layout on MX Keys S for Mac)	Easy-Switch on F1–F3; one-touch keys for play/pause, mute/unmute, volume and snipping tool; Fn + Esc locks the F-keys; Windows, Mac and ChromeOS legends; Caps Lock light
Connections and battery
Connects by
Connects by	Bluetooth and USB receiver	Bluetooth and USB receiver
Devices it switches between
Devices it switches between	3	3
Power
Power	Rechargeable	AAA battery
Battery life (maker's claim)
Battery life (maker's claim)	Up to 5 months	Up to 36 months
With the backlight on
With the backlight on	Up to 10 days	–
Receiver
Receiver	Logi Bolt USB receiver included (not compatible with other Logitech receivers); MX Keys S for Mac has none in the box but works with one, which Logitech advises for Macs with FileVault on	Logi Bolt USB receiver included (not compatible with Unifying receivers)
Battery life detail
Battery life detail	Rechargeable 1500 mAh Li-Po; Logitech quotes up to 10 days with its default backlight settings or up to 5 months with backlighting off	Two AAA alkaline batteries (pre-installed, user-replaceable); up to 36 months
Charging
Charging	USB-C port at the top right; usable while charging; USB-A to USB-C cable (USB-C to USB-C with MX Keys S for Mac)	–
Works with
Works with	Bluetooth with Windows 10, 11 or later, macOS 10.15 or later, iPadOS 14 or later, Android 8.0 or later, Linux and ChromeOS; Logi Bolt with Windows 10, 11 or later, macOS 10.15 or later, Linux and ChromeOS; MX Keys S for Mac lists macOS 10.15 or later, iOS 14 or later and iPadOS 14 or later	Logi Bolt with Windows 10 or later, macOS 10.15 or later, ChromeOS and Linux; Bluetooth Low Energy (Bluetooth 5.1) with Windows 10 or later, macOS 10.15 or later, iOS 14 or later, iPadOS 14 or later, Android 8 or later, ChromeOS and Linux
Software
Software	Logi Options+ (Windows and macOS) for Smart Actions, key customisation and backlight settings; Logitech Flow with a Flow-enabled Logitech mouse	Logi Options+ on Windows and macOS (F-key customisation, Smart Actions, Logitech Flow with a Flow-enabled mouse)
Design
Weight
Weight	810 g	685 g (better)
Width × depth × height
Width × depth × height	430.2 × 131.63 × 20.5 mm	433.8 × 134.8 × 23.1 mm
Size
Size	–	662.6 g without batteries
Materials
Materials	Low-carbon aluminium key-module bracket; plastic parts include 26% (Graphite, Space Gray) or 11% (Pale Gray) certified post-consumer recycled plastic	Plastic parts with certified post-consumer recycled plastic (62% Graphite, 48% Off-white)
Colours
Colours	Graphite, Pale Gray (UK store; Black also sold in the US); MX Keys S for Mac in Space Gray and Pale Grey	Graphite, Off-white
In the box
In the box	Keyboard, Logi Bolt USB receiver, USB-A to USB-C charging cable, documentation (also sold with MX Palm Rest); MX Keys S for Mac comes with a USB-C to USB-C cable and no receiver	Keyboard with 2 AAA batteries (pre-installed), Logi Bolt USB receiver, user documentation
Warranty
Warranty	2-year limited hardware warranty (UK)	2-year limited hardware warranty