I've been doing 100 octane mix with vegas 91 to get 93 octane and it's a noticeable difference. The engine revs more freely and feels more happy especially at higher RPMs.
I've been testing it on stage 1 ACN 91 first then to regular 91 and now 93. Been enjoying every level up in power. Impressive gains each time
Looking forward to trying stage 2 eventually especially with 93mix octane.