As I understand it, it's a co-headlining tour, which usually means that one band will headline one night & the next band headlines the following night & so on.. so SymX's set time would depend on whether or not they're headlining. I may be wrong tho, let me ask management how this tour is going to be laid out.
I was correct on one & incorrect on the other: our management confirmed that the bands will take turns headlining, & IE's management says that both IE and SymX will have the same amount of time per set regardless of the night.