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JDK 1.3 vs JDK 1.2.2_007?

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This has probably already been discussed, so I hope you'll bear with me or redirect me. I just wanted to get people's take on the difference between 1.3 and 1.2. When I first downloaded 1.2 it was 1.2.2_005 but I see sun has upgraded it to 1.2.2_007. Should I be using 1.3? Or 1.2.2_007?
Thanks in advance.
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I assume your question is with reference to the performance of these two JVMs. In which case the answer is run whichever is faster for your application.
I keep about six JVMs on my system, and constantly test with different ones. When I load a new one that has different performance characteristics where some tests run faster, then I keep the JVM. If one of the JVMs gets where it is always beaten by another JVM, I usually delete it from the system.
For example, 1.2.x JVMs are faster than 1.3 at some things, but not others. On the other hand, HotSpot 2.0 seems to outperform HotSpot 1.0 in all tests.
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