I believe there are no regulations specific to the DA42 other than the usual "5 hours in make/model" There are, most likely, Insurance requirements for training and experience in type that must be considered.

The DA42 has the G1000 suite, so it makes sense to have some Glass training/experience before jumping in, especially for IFR work. From a systems standpoint, in a lot of ways it is much simpler than most light twins. in other ways it is more complicated. As with everything.

here are the technical documents and PoH for the DA42:
http://www.diamond-air.at/da42_twins...087573ab0.html

caveat: i am a commercial student, not an instructor.