Things to consider…
>>> Number of ports
The more ports, the more devices you can charge at once but also usually less power is available to each port in use. Some chargers switch this automatically as you connect more devices.
>>> Type of ports
Recent Mac laptops use USB–C, as does iPad Pro. iPhones still use Lightning, so a charger with an extra USB–A port means you can use older iPhone cables.
>>> Maximum wattage
A higher max wattage means faster charging overall. With multiple devices connected, a higher total wattage means more power to each port.
>>> Is Power Switching supported?
All devices on test have more than one port but not all can dynamically allocate power based on what’s connected.