MMD KM40 vs sam Notfromsam S46 R2Wireless vs Kit

The MMD KM40 is pre-built with switches and keycaps installed, making it the more ready-to-use option. The S46 R2 is a barebones kit, so it is intended for buyers who want to build out the keyboard.

Yes, the KM40 lists Bluetooth, 2.4 GHz, and wired connectivity. The S46 R2 lists Bluetooth and wired connectivity, but not 2.4 GHz.

The S46 R2 is described as a barebones keyboard kit, and its listed included items do not include switches or keycaps. The KM40 is described as fully built, with switches and keycaps already installed.

The MMD KM40 lists QMK and VIA support. The S46 R2 lists VIA support, but QMK is not among its listed features.

Both keyboards list hot-swap support. The KM40 vendor says its switches can be replaced without soldering, while the S46 R2 is described with a hot-swap PCB.

The S46 R2 lists aluminum, polycarbonate, and brass among its case materials. Its vendor description also refers to a choice of bottom case.

The KM40 lists a polycarbonate plate. The S46 R2 metadata lists polycarbonate and POM, and its vendor says a POM plate is included.

Both models support hot-swap and VIA, so both allow key mapping and switch changes. The KM40 also lists QMK support, and its vendor describes 10 layers and up to 430 programmable key values.

The KM40 weighs 620g and lists Bluetooth, 2.4 GHz, and wired connectivity. Its vendor describes a 235 × 85 mm footprint, though carrying accessories are not needed to assess these listed dimensions and weight.

Yes, the S46 R2 lists RGB, and the vendor specifies RGB underglow. The KM40 also lists RGB lighting, with its vendor describing multiple lighting effects.

The MMD KM40 is listed as pre-built, and its vendor says switches and keycaps are installed. The S46 R2 is sold as a barebones kit, so it is the build-oriented option.