Well, the Virus C can only approach this. As the oscillators themselves aren't capable of producing a raw supersaw wave. But you can get near that sound for sure. The hypersaw oscillator is only available on ti, ti2 and snow - and I was asking this because I think it was access's way of bringing this sound into the virus. I think with a couple of sawtooth waves detuned apart and making good use of the unison one gets close enough, maybe a touch of EQ as well, to bring the highs up a bit - maybe then a touch of chorus and reverb. But think the ti range of virus is much more capable of doing this, since it can pack a couple of waves together at oscillator level like the real deal - just don't know how close it is to the Rolands.
FM can surely sound similar to this sound. One oscillator modulated by a fast one will get some very juicy harmonics and the fast movement - which is similar to the supersaw. One must find the sweet spots though - one of the things I really like about Virus's FM btw. And you're right, also use FM8 a lot - actually couldn't live without it tbh. I'm a big fan of FM. Lately I've been crazy about analogue kind of FM to, sounds different but it's so cool there's days I'd kill for it. One of the interesting ways to go there would be the euro rack - so much stuff one can do with that.
Also heard that a decent analogue with FM capabilities going through the mooger fooger ring modulator produces the kind of eargasm that you easily forget the money you spent for it eheh.
Oh, and our beloved Monark can to a very good emulation of analogue FM. Also, have you guys heard about Aalto synth?
http://www.madronalabs.com/products/aalto
some sounds you get out of this, you can't find in anything software so far. it's kind like the buchla sound, very very cool