What do the upper case suffixes on the patch names mean?

It's the initials of patch designer - in this case, Ben Crosland and Howard Scarr.

Do you know who SC is as well?

This subject could be more interesting if more names were revealed. Thanks for the info. I'm RR.

JH = Jörg Hüttner

Projects - Jörg Hüttner

Web page showing current and past projects of German composer and synth programmer Jörg Hüttner, selectable by category.

jorghuttner.com

MS = Manuel Schleis

Manuel Schleis – Wikipedia

de.wikipedia.org

FYI, the installer of the Virus TI software also installs a bunch of manuals and tutorials (on macOS in /Library/Documentation/Access Music/Virus TI). Among them is a file called "Patchnames.pdf". It lists all the ROM patches for the Virus TI 1 and contains following notes about the abbreviations:

• ROM-A: Patches by Ben Crosland (BC)
• ROM-B: Patches by Manuel Schleis (MS), http://www.vengeance-sound.com
• ROM-C: Patches by Howard Scarr (HS)
• ROM-D: Patches by Matt Picone (M@)
• ROM-E: Patches by Matthew Stolley (M)
• ROM-F: Patches by Howard Scarr (HS)
• ROM-G: Patches By Ben Crosland (BC)
• ROM-H: Patches By Ben Crosland (BC), Cosmic Dreamer (SV), HJ Scheffler (JS) and Mikael Hansson (MH)
• ROM-I: Patches By Cosmic Dreamer (SV), Howard Scarr (HS) and Rob Papen (RP)
• ROM-J: Patches by Joerg Schaaf (J), Matthew Stolley (M) and Zack Steinkamp (zs)
• ROM-K: Patches by Joerg Huettner (jh) and HJ Scheffler (JS)
• ROM-L: Patches By Xmorph/Icon Of Coil (XM) and Joerg Huettner (jh)
• ROM-M: Patches by Manuel Schleis (MS) and Mikael Hansson (MH)
• ROM-N: Patches by Ben Crosland (BC) HJ Scheffler (JS), Matt Picone (M@) and Shin Murayama (SM)
• ROM-O: Patches By Cosmic Dreamer (SV)
• ROM-P: Patches by Claudio Cardone (CC), Cosmic Dreamer (SV) and Peter Schelfhout (PS)
• ROM-Q: Patches by Juho Lepisto (JL)

This by itself is a piece of synthesizer history.