What’s your favorite analogy to describe #BTC vs ETH/crypto to #deniers and #skeptics?

On the surface they seem pretty similar, but most advocates today would agree they are quite distinct

For example; the car and the bicycle are both vehicles built of metal and rolls around on rubber tires, transporting goods and humans. On the surface they are pretty similar, and while they indeed overlap somewhat in their use case, but most people would treat them as fairly distinct concepts. Few people investing in a car company would also invest a portion in a bicycle company “just to get some diversification”.

So, what’s an analogy you have had success with conveying?