Oh, there's nothing's so different about them.
5 seconds sound clip from the The Asphalt Jungle (1950) movie soundboard.
You can hear this line at 01:15:25 in the Blu-ray version of the movie.
Quote context
[...]
- Why, you're as pale as a ghost. What's the matter?
- Oh, I... Well, I just had some bad news. A man who works for me got killed.
- Oh, how awful. Was it an accident?
- No. No, it was, uh, an intentional killing.
- No.
- Oh, there's nothing's so different about them.
- After all, crime is only... a left-handed form of human endeavor.
- Ever been in Mexico City, Dix?
- Nope.
- It's 8000 feet up. The air is very pure.
- Many first-class clubs and restaurants, a horse track and girls. Beautiful young girls.
- How would you like to go there, all expenses paid?
- Sorry, Doc, not interested. I'm headin' home.
[...]