u-he's Diva is by far the best I have. Miles better even than their excellent ZebraHZ; Diva crushes it. I never would have believed you could get rich synth sound like that from a computer.
I do love Diva, but I may have to
respectfully (emphasis on the respectfully) disagree that it's better than Zebra or even ZebraHZ. I think both kind of have their own thing that they do well.
Diva is pretty classic when it comes to oscillators and types of modulation it can do. It's got LFO's and a couple different flavors of ADSR envelopes. Classic. (There's a lot of other stuff it can do I'm glossing over too, I realize).
ZebraHZ has got a lot more options for modulation between the 4 X/Y pads and the MSEG stuff. I haven't set this up on TouchOSC on my ipad yet, but I plan to this weekend. The arpeggiator in Zebra is more advanced than Diva's as well.
It's got more different oscillator shapes to choose from too, I'm pretty sure. Edit: Debateable. I missed the digital OSC section of Diva.
I will say, I think Diva comes with the better factory presets, but there are some GREAT 3rd party sounds for both HZ and Diva. I actually just did a demo for Heartwood Soundware's new HZ patches, and there are some great patches he's got in there. Super useful for action/tension kind of stuff. I don't think he's as well known as a guy like The Unfinished is, but his sounds are just as good (though they fulfill a different purpose for me). They're also a really solid bargain.
Anyhow, I love all of the u-he stuff. HZ is a little more complex to program from scratch I think than Diva or Repro is, but they're all great synths capable of some great sounds.
Love the tracks, by the way John. The Kingsglaive stuff is top notch.