Roundtables are my personal favorite part of the conference. A lot of deeply knowledgeable VFX and tech art types come and discuss various parts of what works for them on their teams at their studios.
One thing i especially love is that some of these individuals don’t always have a super big online presence coz they’re busy making games and such, so it’s pretty rare to hear from them.
As to the difference between days, the crowd changes a bit, so we get varied perspectives. Also, the focus of each day changes, as directed by the facilitator. There’s never enough time to cover everything we’d like, so we try to touch on a broad variety of things spread over all three days.
Hope that (at least kind of) addresses your question.