Related Clues:

• 'What's the ___?'
• Subtraction amt.
• Subtraction result (Abbr.)
• Distinction, slangily
• "What's the __?"
• 'What's the --?'
• Distinction: Abbr.
• "What's the ---?"
• 'What's the ___?' ('So what?')
• ''What's the __?''
• 'What's the ('Who cares?') --?'
• 'What's the --?' ('So?')
• Variance, in the vernacular
• Distinction, briefly
• Lack of similarity, informally