Scimitar's 8 mm Key Slider
The standard Scimitar Elite Wireless has a 12-button side panel that slides by up to 8 mm and locks with the included tool. That helps when a fixed panel does not line up with your thumb; it does not change the number of side buttons.
Tom's Hardware measured the M913 at 122 × 92 × 42 mm and 129 g. The 122 mm figure is its length, not its weight; no removable bottom-weight system is listed for this model.
An index button with a default to check
The M913 adds a dedicated button next to left click. Its manual shows the rapid-fire control can send three left-click actions for one press. If a game or activity requires one physical press to produce one output, use Redragon's utility to remap it to a single key first.
The Scimitar does not have that extra top-left button. Its programmable controls follow the normal mouse layout, so it does not need the same triple-click reminder.
Sensor, polling and switches
Corsair lists a MARKSMAN 26,000-DPI sensor and optical main switches for the standard Scimitar. Tom's Hardware lists the M913's PixArt PAW3335 sensor, up to 16,000 CPI and polling options up to 1,000 Hz. Maximum DPI is an upper limit, not a quality ranking; the stated wireless polling ceiling is the same.
The products use different primary-switch designs. That does not establish which will last longer in your setup, and the M913's polling options do not exceed the Scimitar's 1,000 Hz wireless rate.
Connectivity and software
The Scimitar connects through 2.4 GHz Slipstream, Bluetooth or USB-C. The M913 uses a 2.4 GHz receiver or USB-C cable and does not list Bluetooth. Corsair uses iCUE for button setup; the M913 uses Redragon's utility.
For a laptop that switches between Bluetooth and a receiver, the Scimitar has more connection options. For a desktop with a fixed receiver, the M913's modes may be enough.
How this differs from the SE page
The standard Scimitar uses the MARKSMAN 26K sensor and has a listed 120-hour maximum over 2.4 GHz. The Scimitar SE uses the MARKSMAN S sensor and has a different battery rating.
The matchups share the M913 and a 12-button Scimitar layout, so there is catalog overlap. Choose the page that names the Corsair version you are considering.