Where are you located?
"Octane" ratings are not the same the world over.
93RON (Europe) is close to 89AKI (North America)
As the HPD is a stock item, it should run on up to E10 (10% enthanol) without problems, but I'd only recommend using brand name "Top Tier" fuels to ensure that there isn't more than this.
Shell V-Power 91 Octane (AKI, or RON+MON/2) contains no ethanol. That's all I use in the good cars.
EDIT: btw, it won't damage the supercharger as the subject line suggests, but you need to consider the engine. I don't really see why 93 is required (if that is using the North American rating). JRSC was calling for 91, which is what most forced induction cars are tuned to run on. MINI interestingly can run on 89. Octane relates to early detonation qualities, and by packing more fuel and air into the cylinder, you want to make sure that it does not explode early. Your ECU does adapt to ignition quality to both preserve the engine and minimize emissions. It should be able to handle 91 AKI without issue.
SOME SAY, that when he gets into his car, he plugs the IMA cable into his left ear Ö but no one can tell who is charging whom!