When this synth was first announced I was convinced that I’d be being one at some point in the future. But now, having seen quite a few demos of patches I’m not so sure. What I’ve heard so far, there’s nothing that probably can’t be done on my Rev2.
You bet it can do stuff your REV2 cannot... that's a 100% certainty... the digital front end allow for so many more varied timbres because of the Wavetables, and the FM capabilities. The problem is that people simply have not yet programmed the sounds that will convince you of this, and Novation has a reputation for always putting typical EDM type sounds in their factory pathces.
Never trust a synth on it's factory sounds... look at it's engine instead, and it's flexibility. I have PEAK and REV2, and I can certainly say that they complement each other quite nicely... yes they can both do a lot of the same territory, but both have their own thing as well that make it worth having both for me.
If you need to compare with a DSI instrument that comes close, it's probably much more the Prophet 12, and still, they also have enough differences that they would go well together (in my opinion).
One thing is certain... the moment I can see a way to fit a SUMMIT into my studio, it will be exchanged with my current PEAK... hopefully they'll do a module version of the SUMMIT, but my intuition tells me it'll never happen... unfortunately...