I'm looking for some on-line documentation (third-party if possible) contrasting the main differences between Oracle 9i's Heterogenous Connectiivity Services and Db2 Information Integrator. I am mainly interested in issues including:

1. data sources supported
2. performance differences
3. overhead requirements
4. pro/cons of each

If anyone has this information or could point me in the right direction, I'd be greatly appreciative.