Depends on which models they are.
If both are All Americans, they should be virtually identical. The A3 All American went into production in 99 and was basically unchanged through the end of that generation in 2014.
For engines, both are going to be electronic and both are pre-emissions. So again, basically the same.
Depending on what models they are, and what engines and transmissions are in them, one might be more preferable than the other though.