When you make a comparison, you need to say clearly what you are comparing. If you leave the second thing out, the sentence becomes confusing or sounds unfinished. That’s called an incomplete comparison.
In the first sentence, the reader asks: better than what?
Say what you are comparing it to:
These words need something to compare to. In a conversation, you can leave it out if the other thing was just mentioned. In writing, and when the sentence stands alone, say it clearly.
If your sentence uses a comparison word (like better, more, faster), ask: “Better than what?”
Then put the answer in your sentence.
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