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100% agree.
After I put the Nismo centre into mine... Holy feck, totally changed the car into a grip machine.
You MUST have a rear diff done as well to compliment it though IMO. Especially if you have A-LSD, which the OP will have... The A-LSD firmly shits itself once you put a decent front diff in as there is so much grip forward it doesn't know what to do at the other end. Add 15+ years of wear, it's not pretty.
So if you do one, you do both as a rule or at least get the rear done not long after as it's pretty shit to drive in a spirited fashion.
Mechanical over electronic in terms of what you get more gains from for that type of stuff. Transfer case & Front/Rear diff combo will blow a controller outta the water, it'll also cost you about 4-6k more
In basic terms the 4WD controllers are controlling the amount of power sent forward, sooner etc as XKLABA said. However if things are worn like the transfer case, diffs and so on, there is only 'so much' electronics can help with and this is where doing the mechanicals really makes the biggest difference.