The compounds C₆H₁₂O₆ (glucose) and C₃H₆O (acetone) have the same types of atoms: carbon (C), hydrogen (H), and oxygen (O). However, they have different numbers of each type of atom.
C₆H₁₂O₆ contains 6 carbon atoms, 12 hydrogen atoms, and 6 oxygen atoms, while C₃H₆O contains 3 carbon atoms, 6 hydrogen atoms, and 1 oxygen atom.
Therefore, the best description is:
same types of atoms, different numbers of each type.