What's the benefit of upgrading to "Hyperdrive II" in Stellaris?

Our scientists just figured out that there is a better way to travel using what they call 'Hyperdrive II' technology.

Any attempt to get more information from theme has encountered with the following pointless information:

Our administrative officers searched the empire archives (google) and couldn't find the needed information.

If your scientists are willing, we'll be happy to hear more about this technology, compared to the existing 'Hyperdrive I'.

We might even consider replacing our current CTO, with yours or even a potato.