Main bowl
The volume of the main bowl supplied with the device.
For more information about the main bowl, see "Capacities". And the amount of product that can be loaded into the device at a time directly depends on its volume. On the other hand, a capacious bowl has the appropriate dimensions and cost, and also puts forward increased requirements for engine power. Therefore, you should choose according to this parameter, taking into account real needs. And also you should consider that for stand mixers with a bowl, in most cases, the volume means the total size, and not the useful one. The bowl must be filled less than 2/3 during cooking (here it is already individual and you need to look at the instructions for the product).
Power
The rated power of the device, in fact, is the power of the engine installed in it.
The higher this indicator, the more performant this model is, the more suitable for “heavy” work and the more applications can be provided in the design. For example, in the case of mixers (see “Appliance type”), a power of up to 250 W is considered good for liquid products; for more solid tasks, like kneading tough dough, you should pay attention to more powerful models. Detailed recommendations on optimal power can be found in special sources.
Note that powerful devices are usually equipped with more durable nozzles that can withstand high loads.