Differences...

Fiat and Ambassador
This one occured when we were driving...
Q: What is the difference between a Fiat and an Ambassador?
A: An ambassador can pee in the VIP lounge of the MEA, but a Fiat can't even pee, forget the VIP lounge....

Muscles, tissues, cells...
Inspiration from high school biology:
Q: What is the difference between muscle and tissue?
A: You can blow your nose into a tissue, but you can't blow your nose into a muscle...

Modes of transport
Q: What is the difference between bus and car?
A: You can say बस कर but you can't say कर बस ...