The term refers to the capabilities of the device. They can be extended and limited. Devices with wide capabilities are professional, and those models with limited functionality are household ones. The former, of course, are better and that’s why. They have:

A more powerful motor is installed;there is a cooling system;the cutting part is made of high strength steel;continuous and long work is provided;it is possible to change the blade.

However, this type of machine for home and rare use is not needed. They cost several times more than a budget household device, which will cope with the infrequent task in the same way.