We have always done two days at Universal when we go to Orlando, and we have always gone before Disney. But.....many people recommend going after Disney because of the FOTL access (I guess I'm assuming you are staying on-site though). Anyway, if you are staying on site at Universal, many say that going straight to the front of the line gets you spoiled, and makes waiting in line at Disney even harder. But, considering that you are going in October, I don't think lines are as bad. Maybe consider doing the Universal part over the weekend part of your trip, when possibly lines could be a factor (again, this is assuming you are staying at Universal. If not, my entire post was irrevelant!!!)