Definitely normal tables. The Zoom tables are full of regs and also help bad players fix there most common leak, which is playing to many
hands due to boredom. For instance there is way less limping in Zoom games. The Zoom format is also a dead end, if you eventually want to move to something other than online cash games. You obviously cant play Zoom in live poker, and the format is also not common for online MTTs.
It can be ok to occationally play a Zoom session, if you are short on time, but if you are trying to build up a
bankroll - and your skills - in online cash games, you should definitely focus mainly on regular tabels. Learn to exploit bad players and avoid sitting on 6-max tabels with 5 other regs and grind yourself to death on the rake.