Both can work and people are going to be biased based on where they are from.
Even though I'm in EST and I'm trying not to be biased but it is way more popular. A lot of TV shows that actually are recorded live in California air live only to the EST time zone and have the 3 hour TV delay for the west coast.
Listing something with both works fine too (11pm EST/8pm PST)
I can only imagine the issues people in areas with a half hour time zone like Newfoundland have.