Feature request: Ability to have multiple examples to run and compare at the same time

[itsdouges]

Let's say I have two examples, a & b, and they're the same component but slightly different. Would be cool if I could somehow run this test against them both in the same run without needing to jump between examples to compare 😄

[alexreardon]

It is a bit tricky with how storybook works. As an addon we merely get a function to render the current story