During the opening of Starsky's video, before he revealed he was really playing the plugin, I thought to myself either he has chosen patches which intentionally sound more like a softsynth to play on the hardware, or it's a ruse and he's really playing the plugin controlling it with the hardware...I was able to instantly recognize something missing in the tone... it turned out to be the latter.
I've noticed that while many emulations appear to be producing identical sound when dissected under oscilloscope, the end result is simply never quite as appealing to my ear as actual hardware.
That said, it looks like an amazing plugin for someone that doesn't own the hardware, wants to have some fun with stereo layering (no doubt when blended with the tone of the hardware, run through FX, in a mix etc. distinguishing would be difficult). Quite honestly I'm tempted to buy this, if only for the ability to turn off filter quantization. I'd love to see Sequential add this feature to the Rev4 hardware, even though it does sort of undermine the Prophet personality and turn it into a different synth.
If you've never heard any of them, Softtube's analog emulations are some of the best available, I own a couple of them. Model 84 is an amazing Juno rendition. I find it to be a CPU gobbler on my older PC, and I have enough hardware synth options that I don't reach for it that often, but sonically it is truly impressive and I'm sure this one is too.
One thing that holds me back from a purchase is the rearrangement of knobs. After working on the Rev4 so much, it feels a bit off to work with a UI that isn't laid out the same.
https://www.youtube.com/watch?v=8TaKS8NEZqg