I have a project that uses Flow. I've had no complaints with it so far, but I've been craving the IDE support of TypeScript. What's the difference between the type system of TypeScript and Flow? Would it be worthwhile to switch?

Part of me wants to wait out the Flow team come up with better IntelliSense support. The `flow ide` command in the release 0.42 is a big step in the right direction. But it seems like TypeScript already has this, and if the delta between the two type systems is small, I might just go ahead and switch.