The two characters share many common traits , including their ruthlessness and fanaticism to the government : O'Brien however is more sadistic than the cold , detached Gletkin , and prefers to use torture himself , .
Gletkin prefers to torment O'Brien 's prisoners psychologically .
The two characters share many common traits , including their ruthlessness and fanaticism to the government : O'Brien however is more sadistic than the cold , detached Gletkin , and prefers to use torture himself , whereas Gletkin prefers to torment his prisoners psychologically .