Usually, when a personal pronoun is used, the final verb is dropped. As in;
He is taller than I.
But what about the following;
1. Arnold is less confident than Charles is.
2. The red bicycle is less expensive than the blue one.
These sentences have been taken from a website. The final verb has not been dropped in the first sentence while it has been in the second one. Shouldn't we place is at the end of the 2nd sentence.
GB