And, both are also known for their unique work.
The hand blender is a handy Kitchen appliance used for lightweight tasks like blending of two or more liquids, chopping of vegetables (if chopper comes with it), making smoothies, buttermilk churning, Whipping the cream (With a dedicated whisker), and Dough kneading (if dough kneading hooks comes with it).
It consists of an electric motor at the top and blades at the bottom.
But, the manufacturers are providing many extra accessories such as juicer, dough kneader, vegetable chopper, and many more.
Like a stem in the case of an electric hand blender, the coupler is used to connect the jar with the motor.Now, consider your purpose first.
If you want to grind Urad dal for making Idli or Dosa butter, then you need a machine that consists of a powerful motor.