We have found less problems with the JDriver when XA transactions, but your mileage might vary. Oracle's drivers are very good and they also offer an OCI driver. If performance is your main concern than use JDriver or the OCI version of Oracle's driver. If ease of configuration is the main issue then use Oracle's thin driver.
If you need to access special Oracle features such as Oracle Spatial data then you will need to use Oracle's drivers.
Finally, if you are writing plain JDBC, not messing with driver-specific code. it will be easy to
test your application with both drivers and choose the one that works best.
