No. Because there are some key questions you need to ask about IO balance that you don't have to about SO balance.
First of what level of balance? Are we saying IO builds that are frankeslotted, procs, purples, attuned IOs? At what balance point do you start with? What assumptions do you start with about what the majority of players are slotted with? What the "best" and "worst" slotting combination or combinations for various powers? And who decides that? Who takes the time to dig into the code to do the unit testing for that as powers are tweaked in code around those balance points?
Take a look at how long changes currently take to get to live now on HC, no multiply that by many times the balance pass you'd have to do for IOs and their various options.