its all in the throttle response to which you are actually going to feel. With the 93 tune the tuner has a wider array of options and is able to load torque and Race tune where the 87 limits their options to basically the performance tune. To me personally the difference between 87 and 93 was night and day.
If your wallet is taking a hit think about this, 93 octane is higher then 87, so it takes longer to breakdown which equates to better MPG when compared to 87. It won't offset the price difference but it'll chip away a small portion of it to where you don't feel bad anymore.