Logitech MX Master 4 vs. 3S vs. 2S: Key Differences and Upgrades

Evolution of the MX Master Series

• 🚀 The Logitech MX Master series has seen significant evolution, with the 2S released in 2017, the 3S in 2022, and the 4 in 2025.
• 💡 Key upgrades from the 2S to the 3S included a jump to an 8000 DPI sensor and the introduction of USB-C charging.
• ⚡ The MX Master 4 introduces further advancements like customizable haptics, an action ring, and a USB-C Bolt receiver.

Scroll Wheel and Connectivity

• ⚙️ The 2S features a mechanical scroll wheel, while the 3S and 4 utilize a silent, electromagnetic "Max Speed" scroll wheel.
• 🔊 The MX Master 4's Max Speed wheel adds haptic feedback for subtle pulses when switching modes.
• 📡 Connectivity has evolved from the older Unifying receiver (2S) to the Logi Bolt receiver (3S and 4), with the 4 featuring a stronger 2.4 GHz signal and a USB-A Bolt receiver.

Sensor, Battery, and Ergonomics

• 🎯 All three models use the Logitech Darkfield sensor, capable of tracking on glass, with DPI doubling from 4,000 on the 2S to 8,000 on the 3S and 4.
• 🔋 Battery life remains excellent across all models, offering around 70 days on a full charge, with the MX Master 4 offering an impressive 3 hours of use from just a one-minute charge.
• 🤏 While the side thumb wheel placement varied, the MX Master 4 offers a more comfortable and accessible position.

Software Features and Customization

• 💻 The Logitech Options+ app allows for extensive customization, including gestures, button assignments, and smart actions.
• 💡 The MX Master 4 introduces an Action Ring for quick access to customizable shortcuts, such as launching applications like ChatGPT, locking the PC, or taking screenshots.
• 🤖 Smart Actions enable users to create custom workflows triggered by specific actions, automating tasks like opening multiple applications for work or social media breaks.

Final Comparison and Recommendations

• 🏆 The MX Master 2S is noted as aging, held back by its micro-USB and older receiver.
• ✅ The MX Master 3S is considered a sweet spot with quiet clicks, USB-C, and 8,000 DPI.
• ✨ The MX Master 4 is recommended for power users due to its advanced features like haptics, the action ring, and enhanced connectivity, representing a significant performance upgrade.