What is the difference between compressed air and nitrogen gas?

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What is the difference between compressed air and
nitrogen gas? 
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• Air compressors can be used for a variety of
  tasks, such as providing high-pressure clean air
  to fill gas cylinders, moderate-pressure clean
  air to a submerged surface supplied diver,
  moderate-pressure clean air to drive some
  pneumatic HVAC control system valves in office
  and educational buildings, and providing a
  large. 
• One of the fundamental components of nature and
  an element is nitrogen. In its typical form, a
  diatomic molecule called N2, which comprises two
  nitrogen atoms bound by a triple bond (NN),
  nitrogen is found in the air. 
• A homogenous mixture is an air. It mostly
  comprises oxygen and nitrogen (O2 and N2), with
  trace amounts of argon (Ar) and other gases. 
• Since nitrogen makes up 78 of air and there
  aren't many distinctions between nitrogen and
  oxygen in terms of size, weight, density, heat
  capacity, and other factors, there aren't many
  differences between nitrogen itself and air (21
  O2 and 78 N2). 
• Both pressurised nitrogen and compressed air are
  utilised in tyres, and different arguments are
  put out about why nitrogen is preferable to air.
  A machine to concentrate nitrogen is present in
  many locations where tyres are filled with
  nitrogen. Typically, 90 to 95 of the gas that
  leaves these machines is nitrogen. But keep in
  mind that air already contains 78 nitrogen. 

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• Those who advocate for the use of Compressed air
  nitrogen gas generator make assertions regarding
  it that are challenging to support. One is that
  less tyre maintenance will be necessary because
  the N2 pressure in the tyre will stay higher and
  longer. That statement has some validity since
  nitrogen moves more slowly through rubber tyres
  than oxygen does.
• Some would contend that the gas escaping through
  the tire's walls shows Dalton's law of effusion
  (the movement of gas molecules through tiny
  pinholes). However, transferring N2 and O2
  through the rubber tyre is best approximated by
  solubility," according to engineers who study
  this type of stuff.
• Oxygen is more soluble in rubber than nitrogen
  it dissolves there to a higher amount and travels
  through the rubber walls more quickly. Are the
  advantages of employing nitrogen in tyres over
  air sufficient to justify their use? Only the
  consumer has the power to decide.

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• Depending on what you plan to use it for. The
  usage and applications will change since nitrogen
  generator supplier won't support combustion,
  compressed air is required if you wish to utilise
  it in a blowtorch, say to perform a little
  glassblowing. 
• Use Compressed air nitrogen gas generator instead
  of air from a compressor if you want to create
  anything that is sensitive to moisture since
  nitrogen gas comes out of a nitrogen cylinder and
  is incredibly dry, whereas air from a compressor
  would require additional drying steps. 
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