I have seen quite a few of these "known good ones" that display a degree of variation & I don't place a great deal of faith in the usefulness of the cam crank waveform on this engine.
The reason I think we see so many different "good" captures is, due to the way that the cam signal is generated. The cam position sensor signal is triggered by cylinder 3 intake cam lobe, which is a far less precise method compared with the usual dedicated machined trigger that most cam sensors collect their signal from.
Of course the cam signal is not required to be "super accurate" as it is only needed for the purpose of cylinder identity, so anywhere "there abouts" is good enough.
It is a while since I looked hard at one of these, so my information may need verification, but I think it is about right.
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