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The Logitech MX Master 3S and Razer DeathAdder V3 Pro are most easily told apart by their overall size. On height, the Razer DeathAdder V3 Pro measures 128.0 mm against the Logitech MX Master 3S's 124.9 mm — about 3.1 mm more. On width, the Razer DeathAdder V3 Pro measures 62.1 mm against the Logitech MX Master 3S's 61.0 mm — about 1.1 mm more. On thickness, the Logitech MX Master 3S measures 43.0 mm against the Razer DeathAdder V3 Pro's 38.8 mm — about 4.2 mm more.
The Logitech MX Master 3S is the heavier of the two at 141 g, compared with 63 g for the Razer DeathAdder V3 Pro. That is a 78 g difference (124%). In daily handling the difference is easy to feel.
| Metric | Logitech MX Master 3S | Razer DeathAdder V3 Pro | Diff |
|---|---|---|---|
| Width | 61.0 mm | 62.1 mm | -1.1 mm |
| Height | 124.9 mm | 128.0 mm | -3.1 mm |
| Depth | 43.0 mm | 38.8 mm | +4.2 mm |
| Weight | 141 g | 63 g | +78.0 mm |