I can only speak for zoom vs normal tables on stars. But zoom is a bit tougher more regs less fish compared to normal tables. Also you will be facing more situation vs unknowns which really is tough and it will probably hurt your winrate a little bit.
I would just test both and see what you more comfortable with. Rush has certainly advantages, you can just pause the tables without loosing your seats for example. You can play less tables while still getting in a lot of hands.
Nl2-Nl5 should be very fishy even with rush so its a good stake to test it and see if you like it.
Just give both normal tables and rush a shot and decide afterwards what you like best.