more spark

Totally different things. When you adjust timing via the distributor, you are adding X amount degrees advance/retard to EVERY value in the spark tables. Its referred to as a "global" adjustment because it affects everything.

When you adjust spark via the tables, you can have different values of advance/retard based on RPM. This is an infinitely more powerful tool. This way you can maintain stock driveability but have all your timing in at a lower RPM. For example, I had all my timing in (32 degrees total on stock E7 heads) by 2500 RPMS at WOT.

Adam

If you have a turbo like your sig says then you really probably do not want to get too aggressive at this point.

You will need to look at boosted cars values and details of the tune regarding boost. Most tend to step down in total timing IIRC as RPM goes up.

You also need to pay attention to the load number and RPM as seperate things. Below 50% load your doing more DD/cruise/stop and go type things and that will be a different needed set of values vs. higher loads of .80+ that tend to be your WOT high RPM areas.

Again if your running boost you really need to look at specific boosted tunes/setups as a boosted tune is a whole different ball of wax than N/A and n2o tunes. If you base a boosted cars tune on a non boosted cars tune you will break some stuff.