Rules for Comma Usage. Tip #8: Comma Within a Comparison
Don’t use a comma before “than” when you’re making a comparison.
Incorrect: This box is lighter, than that box.
Correct: This box is lighter than that box.- Эта коробка легче, чем та коробка.
Incorrect: Hardcover books are more expensive, than paperback books.
Correct: Hardcover books are more expensive than paperback books.- Книги в твердом переплете дороже книг в мягкой обложке.