S8 Euro TCU vs Unitronic Tune
 

Are these essentially the same end result? I would like the trans to behave more sporty.

Check your trans coding, it may not be in sport mode even if it's a S model:

audipages Coding the A8 Automatic Transmission

Unitronic takes it from 360 to 383 hp...not a bad thing either ;)

Thanks, I’ll plug in Vagcom and take a look