i would highly recommend you do your own research especially how fast pump gas alky cars are running these days,especially since you already have what you need already.500rwhp is 500rwhp no matter what fuel is used,and the truth of it is both fuels will easly do that.one uses much less volume vs the other,and is less corosive.
It's the same .. only different
E85 if available is a far better solution than ALKY + 93
In situations where E85 is a 60 mile drive or not available at all .. ALKY + 93 is the ticket.
I've used both.. setup a bunch of cars on ALKY + 93 .. ( they run well)
after running E85 since 02 ... I'd NEVER pick ALKY +93 over E85 if availability isn't a concern.
The problem with E85 its not available everywhere .. then ALKY is the clear winner