Which JDBC driver to use on Oracle 8.1.7

Hello,
My colleagues always use the same JDBC driver, regardless of the platform the application is running (Windows, Sun, AIX, ...) and side (server side, client side).

Oracle.driverName=oracle.jdbc.driver.OracleDriver
Oracle.dbUrl=jdbc:oracle:thin:@serv3412:1521:ocspull


The Database server is a Sun Solaris.

Our test program from a Windows Client (with the above driver) is running considerably faster than when started on the actual database server .

Should we try to use an OCI driver or KPRB driver ?

Regards
Luc