You'll be fine if you accidentally put 87 I would just get the 93 back in asap. I'll never understand why people deliberately put the wrong low octane fuel in their high performance cars that specifically call for high octane, listed in several places, including stirring you in the face while you're filling right there on the gas door. Especially with how small out tanks are what is it a maximum of $2 difference between filling with 87 or 93. If your that strapped for cash you can't swing $2 you should probably not be driving at all, and certainly be looking for a different car.
Will it destroy your engine, of course not. But there is most definitely a difference and I just don't see a reason to ignore the manufacturers recommendations over something so trivial. Believe it or not sometime engineers actually know what their doing
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"At no point during your rambling, incoherent response did you ever come close to anything that could be considered a rational thought. We are all now dumber for having listened to it. I award you no points, and may god have mercy on your soul."