[MiracleMax]

Hmmmm.... If your using the T/A kitm you are physically adjusting the relationship between the sensor and its trigger but still using the same spark tables provided by the factory. I would hazarad a guess that by adjusting the timing with a T/A kit your firing on a cylinder when its effective compression ratio is higher (since it seems power is up across the board), but this changes the fuel requirements for the engine.

Using a chip could provide more aggressive timing tables as well as changing initial timing like a T/A kit so potentially a chip could offer more power in the way of ignition adjustments.

I dunno I'm old school when it comes to the chio stuff, it always seemed like you could get more out of a 5.0 per dollar spent if you ignored the chip