Things to consider…
>>> Size and weight
All these printers are smaller than a typical desktop model, but some are particularly small, albeit with some trade-offs in terms of features.
>>> Battery life
Most of the models on test have the option of battery power for use away from mains power. Some of the batteries are integrated and others are an extra.
>>> Connectivity
Wireless connectivity is standard but there’s other options ranging from USB to Bluetooth. Some models can also create peer-to-peer wireless connections with no need for a router.
>>> Print performance
Your needs may vary from simple black and white through to colour photos, and different models have different strengths.