Logitech MX ERGO vs Ploopy Thumb Trackball

The Logitech MX ERGO and the Ploopy Thumb Trackball are both thumb-operated trackball mice. The Logitech has a more polished build quality, with higher-quality materials and better fit and finish. It's also a wireless model that connects via USB receiver or Bluetooth. The Ploopy, by comparison, is a wired-only model with a much more DIY look and feel, including a rough 3D-printed body. That said, it's designed with a high degree of hardware customizability and supports more in-depth software customization via VIA and QMK. It also has a newer sensor and better click latency, making it the better choice for gaming. However, the Logitech's scroll wheel supports tilt inputs, which the Ploopy lacks. The Logitech also includes a tilt adjustment plate, while the Ploopy's optional wedge is sold separately and didn't fit securely on our unit, resulting in some wobble during use.