The H90 has two new reverb algorithms; SP2016 Reverb and Wormhole. Both are very great sounding reverbs and are classic Eventide sounds.
Additionally, the Spring algorithm has been updated with a few new features.
Details about all of the reverb algorithms can be found here: https://cdn.eventideaudio.com/manuals/h90/1.9.7/content/algorithms/reverb.html
Most importantly, the ability to route 2 algorithms together will open up a world of possibilities. You can combine new effects with some of your favorite reverbs from the Space, or even combine 2 reverbs from the Space in series or parallel.
You can also use Dual Mode for two separate paths, which would allow your to run two different synths each into their own reverb (basically like having two Space pedals.)
So, yes there are lots of advantages! Let me know if you have any other questions.
