In John's Vision of the 'Cherubim' or 'Living Creatures' they are described as like animals,
      The first was like a Lion,
       the second like a Calf,
       the third like a man's face,
       the fourth like a flying Eagle.

      John's living creatures had 6 wings, while in Ezekiel's Vision the had only 4 wings and were accompanied by the Holy Spirit and
traveled on wheels, which shows that they were on some mission, attended by the Lord, who sat on His Throne over their heads.

      But the wheels are absent in John's Vision, the scene is in Heaven, the permanent home of the Throne of God.