Good question! The answer is a little complex at the moment, but I think the best course would be to explore what's in the module first, since there's a ton of capability in there already, and then keep an eye out for the editor, which is currently in alpha and could potentially move into beta in January 2020. (If you'd like to join the beta team and have early access to the software, let us know.)
The details:
The wave sets are the same across both platforms, but the parameter set is slightly different. You can model nearly everything from the module within the plugin, however the software version is not capable of FM, or clock synchronization of the razor, as of this writing. The plugin is also far more complex, with double the wave segments per oscillator, and all the parameters of a full synthesizer (as opposed to just the oscillator parameters). If you like, you can download the 30-day trial from Tracktion (our software distributor), and you can explore the full synth engine while we prepare the module editor for release.
Regarding discounts between hardware and software, we don't have the infrastructure to provide that at the moment. While Tracktion handles the Waverazor plugin, our module is distributed by 1010music. Both are incredible partners that allow MOK to release products into both the software and hardware worlds, but they are separate businesses with separate revenue concerns. As a small company, MOK doesn't yet have the resources to make cross platform coordination worthwhile for everyone involved. My apologies, but we will certainly strive to fix this situation in the long term. For now, we can only run occasional separate sales events for either software or hardware, which may coincide, but won't be keyed off of each other.
I hope that information helps a bit. We really appreciate your choice to purchase our Waverazor Dual Oscillator module! If there's anything within our power to make your experience better we'll do it, so please let us know and we'll work with you.
All the best,
Taiho
MOK