In some cases, the comparison is subtle and must be given proper attention.
Ex- The climate of Delhi is better than Mumbai. (Incorrect)
Here the comparison should be between the climate of Delhi and the climate of Mumbai.
The climate of Delhi is better than the climate of Mumbai. (Correct)
Or
The climate of Ranchi is better than that of Gaya. (Correct)
(Here, ‘That of’ means ‘the climate of’)
If the traits are in plural, it will be ‘those of’.
The products of Reliance are better than those of Suzuki.
The scenery of Kashmir is better than Shimla. (Incorrect)
The scenery of Kashmir is better than that of Shimla. (Correct)