He turned back to Harry. "You'll soon find out some wizarding families are much better than others, Potter. You don't want to go making friends with the wrong sort.
(Harry Potter and the Sorcerer's Stone)

"Unless you get out now," said Harry, more bravely than he felt, because Crabbe and Goyle were a lot bigger than him or Ron.
(Harry Potter and the Sorcerer's Stone)

Between the two – much, a lot – which is the bigger in its intensity?