I like it. Particularly the "substantially different type" part. Give the student the POH beforehand, and have a quick quiz about that just before the flight. V-speeds, TO/LD distances, emergency procedures, that sort of stuff.
What I also would like to see somehow is a discussion on "newer" engine types. I mean newer than the traditional Lycosaurus O-320 and such. For instance the different starting procedures of carbs vs. injection. Discussion of FADEC engines (both diesel and avgas) and the vastly different emergency procedures associated with them. Plus some specifics on diesel engines and maybe Rotax. That's probably something for the theory syllabus though.
Furthermore, can we squeeze in an "unusual attitudes" hour somewhere?