In Emma3, he looks very angry and expresses very vehemently his disapproval, and argue with Emma about it. But in the novel, his response is more calm (although still disapproving):

The circumstance was told him at Hartfield; for the moment, he was silent; but Emma heard him almost immediately afterwards say to himself, over a newspaper he held in his hand, "Hum! just the trifling, silly fellow I took him for." She had half a mind to resent; but an instant's observation convinced her that it was really said only to relieve his own feelings, and not meant to provoke; and therefore she let it pass.(Ch 25)