Awesome, didn't know i could do that to be honest. I have "upgraded" roms before, but I honestly don't know the convention for doing so. How do you know what you can update to?
I have updated from say A4SGC00C >A4SGC10C, but it seems like I've tried to update from A4SGC00C to A4TC401L (just another example, it might have been different) and failed. I wish I could get some guidance on this.
Updates are a bit tricky to figure out. The best source is Subaru when they perform a "campaign" update.
You should be able to go from A4SGC00C > A4SGE01C but not to A4TC401L as this is for a different year and specific to a transmission type.