Portable mini fridges come in different sizes and can be used as small mini fridges for small rooms or home use. They are more convenient and consume less energy to be on, as they are more convenient to carry on other go.
Portable freezers are come in a variety of sizes, and they offer more features such as temperature controls and humidity controllers. These freezers typically come in a range of sizes so they don't need to worry about whether the need is large or small space.