Hi Laura,
In one of the earlier discussion threads (http://scn.sap.com/thread/3305550), Please check the response from Lars towards end of the thread. It is mentioned that HANA processing does not ensure "procedural" execution of steps defined in the procedure. Due to the parallel execution of statements it may not be assured that the procedure will execute the statements in the defined order.
Coming to the execution of the statements between different engines, I can suggest you to check the visual execution plan. It will show you if the calculation is happening in the OLAP engine or Calc engine.
I am not aware of any such cheat sheet, but the visual plan can give you a better picture of the execution.
Regards,
Ravi