A comparative deletion is where there is a comparison involving a greater or lesser value in which what is being compared is not specified. As in words ending in 'er' and 'est'. "Better, best, less, least, worst, more, bigger, lighter, smaller, very, even."

Example

"Even you can understand what I'm about to tell you."

"If your tastes were better, people would like you more."

"You can do better than that."

"It would be the least that they can do."