Well, could be...my experience is that if you’re spraying enough to be effective (2-3 sprays should be more than enough) and it’s an actual SAB, it won’t evaporate before you’re done, and it will be more effective than twice as many sprays of a dilute solution. Alcohol evaporates at its own rate, not water’s, though water will slow it down - the same way water limits its effectiveness.
Anyway, those are my thoughts. If/when Shroomery comes back on line, there’s plenty of threads and videos there about how to prepare and sterilize an SAB.