Is the Durametric maybe 3 time more capable? Yes.
Is a "regular" OBD2 code reader helpful? Lots of times for many engine and emissions related codes.
The Durametric site generally has a list of all the airbag, transmission, settings, etc that it will do that a OBD2 won't. Lots of Porsche specific things the OBD2 standard doesn't require a manufacturer to reveal but which Durametric has figured out over the years. Great tool.
If you are going to do serious work on a Porsche, Durametric is highly recommended.
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