Private. As a result of various conversations with GCC SC people
over the past 5-6 years, I think it's better to have the SC
speaking with one voice. This shouldn't be like real-life politics,
where you have factions wired into a zero-sum game, and where
stabbing people in the back is just one more tactic (remember what
I said about trust?). Public GCC SC votes would tend to alter
the patch lobbying process as randoms start pitching their stuff to
particular SC members thought favorable, in the hopes of outflanking
maintainers.