The easiest way to beat reg. 9max tables, because there the fish get tired of waiting and give up faster. In zoom, a bad hand can be quickly folded, so the fish are much slower to give up their stack.
Pretty much this. In Zoom games the average VPIP is lower, players per flop is lower, and there is much less limping preflop. You also cant table or seat select, and its difficult to get invididual reads on opponents or develop dynamics with them. Like knowing when someone might be tilting, because they just lost a big pot. Or if your table image might be that of a maniac or nit, because you have been running hot/cold.
All of this tend to negate skill edges, and in my experience its difficult to beat the rake in Zoom games at any stakes higher than 2NL. Not saying its impossible, but winrates are certainly lower than at regular tables. So unless there is some attractive rake-back scheeme or a leaderboard to contend for, I would just stick to the regular tables. If you are considering to get into live games, then Zoom tables are also not a good practice for that, since for obvious reasons they only exist online.
The one advantage with Zoom tables, that can not be neglected, is their convenience. If the table is running, you just buy in, and you are right into the action without waiting for vacant seats or the blinds to come around to you. And when you want to leave or take a break, its equally fast to get out again. You also play more hands
per hour, so rather than having 4 regular tables running, 1-2 Zoom tables will be enough.