There are lots of great alternatives. I haven’t personally used the V-Synth or SH… But you can get similar tones on pretty much anything.
I’m kind of obsessed on Supersaw type tones and try to make them with everything. Pretty much just jam saws together and put it through chorus, unison works too.
For a mono type sound pretty much indistinguishable, but once you start stacking chords that ring out, “mock” Supersaws sound completely different. JP has a more “Disordered” sound to it’s voices due to a highpass filter over the low end and the fact it starts the osc phases in the stack at different intervals. Where many other Supersaw oscs on other synths have a symmetrical detuning sound that feels more “Ordered”
I mostly use my Virus TI or Nexus for those type of sounds now, but everything lacks the buzzing, bright crunch of the JP Supers. Even my friend who doesn’t know anything about synths noticed the difference while playing in my studio.