HARBETH: M30.1 versus M30

The thread starts:

There is a very nice pair of M30.1s for sale in the classified and I’m sorely tempted.  I already have the M30s and love them. I much prefer them to the Compact 7s which didn’t really work in my room. Not strictly relevant but I also have a pair of HLP3 ESRs which I also like very much, especially for near field listening. Has anyone compared the M30.1s with the M30s? How are they different?I'd be using them with a Jadis Orchestra and/or DA30

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