Just out of curiosity you understand.
You will do them on your initial MEP.
You will probably do them on your renewal.
Depending on the twin the performance varies significantly as does handling for all the usual reasons concerned with where the engine is mounted and which one it is, or whether it has rather nice counter rotating props.
I dont think things have really change with "modern" twins - not that there are very many. The DA42 at MTOW has little performance reserve and because rather like most modern aircraft the airframe is "slippery" to extract the most from low powered engines managing the aircraft on one engine is critical. At MTOW in my opinion you need to be right on the ball should the worst happen at the most critical time and it could easily catch out a rustle or low time pilot.