The two AWs work exactly the same and just like the Mountain Halls does for normal boosted goods.. You take your bonus percent from the AW and add it to your relic boost and then multiply that by your base production and have your total bonus production. My Time Warp gives me 76% extra and my Vortex gives me 44% extra, or 120% together. That is a 2520 bonus based on my base production of 2100 for a 9-hour run in my level 32 elixir/soap factory. The good thing is if you use an MM too, because that bonus is the final multiplier and uses your total of all the others added together.
But I think the Vortex is just as important for the other thing it does: increase the amount of the limited guest race goods the portal can hold. This may let you do an extra research or two before you have to upgrade the portal and, of course, makes the portal profits give more too.