Years ago we made a poster comparing the Australian dollar. Unfortunately if I did the comparison now it would be more like:

Size: Almost identical
Strength: Both strong
Usability: Both reusable
Difference: One is warming the economy, the other records the temperature.

But all the original jokes can be made about the US dollar:

Size: Both are small
Strength: Thermocron = Strong, US Dollar = Weak
Usability: Thermocron = Reusable, US Dollar = Almost unusable
Difference: One is freezing the economy, the other records the temperature.

But the photo with the Aussie dollar is much better.