I started using Amoco Gold (93 octane) in all my 2 cycle equipment about 3 years ago, along with a good synthetic 2 stroke oil (Opti or Amsoil). The 93 octane made a big difference in the way everything runs and stays running. The synthetic runs cooler and with no smoking or fouling. The combination of the two gives more power, better response, less maintenance problems, and for 20 cents a gallon more I will alway use 93 octane in my 2 cycle.
By the way, I made the switch to 93 octane on the advice of a Husqvarna mechanic.
I've always run 93 in my truck and equiptment. I've heard all the different opinions on 87 vs 93. I would think the 93 would be better for an engine because of extra additives, but this is IMO. I am by no means an expert in this area.