Answering my own question, the difference is the 5 at the end. The earlier series ended in 3 and then the next model ended in 4 and now 5.
Thought I would post for any rookies like myself.

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Answering my own question, the difference is the 5 at the end. The earlier series ended in 3 and then the next model ended in 4 and now 5.
Thought I would post for any rookies like myself.

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