Hi Abby! I've worked w/ both VC and SK. I went w/ SK for the AVC halo setting since VC no longer accepts any of the GOG August Vintage line. I do love my single cut bands from VC and highly recommend him also for any pave work!
That depends. What type of pave? And what design are you doing? Do you have inspiration pics? Based off that info I would give my recommendation. But both are excellent! I definitely think SK has better success with rings that are more antique looking...or just more fine detail rings. Where as I really like Leon's lines, proportions and overall flow.
I've only worked with Victor and Leon and only in regard with rings with french cut sides. But based on this experience and references here on PS I would say:
1. Victor
2. Steven or ERD's handforged bench