JDBC Driver JAR Files

In the default installation of PostgreSQL that comes with RedHat Linux,
there are two JDBC JAR files.  These are

    jdbc7.0-1.1.jar
and
    jdbc7.0-1.2.jar

Does anyone know what the difference is (besides the obvious release level)?
Which is the 'better' one to use?

Thanks in advance.

Jerry Jalenak
Statistical Engineer II
Business Information Engineering
LabOne, Inc.
10101 Renner Blvd.
Lenexa, KS  66219
913.577.1496

Jerry.Jalenak@labone.com


This transmission (and any information attached to it) may be confidential and is intended solely for the use of the
individualor entity to which it is addressed. If you are not the intended recipient or the person responsible for
deliveringthe transmission to the intended recipient, be advised that you have received this transmission in error and
thatany use, dissemination, forwarding, printing, or copying of this information is strictly prohibited. If you have
receivedthis transmission in error, please immediately notify LabOne at (800)388-4675.