With a stock engine, stock piston, stock porting and everything.... 93 is perfect.
Don't waste your money on 110 because it isnt' going to do anything. Plus, I'm still not sure how the EFI is going to agree with the lead in the gas? (It may be fine, don't expect your Suzuki shop to know, ask Paul Turner or Ryan at one of the races).
If you really have your heart set on running better gas, then mix 93 and 110 50/50 for your wallets sake.
We're talking about the Sunoco 110 leaded PUMP GAS here....
I wouldn't put octane booster in my gas if you paid me, what is that shit?