Test drove the new M550i for a few days and I'm really impressed by the car. Feels smoother, quieter and definitely more powerful than the pre-facelifted car.
Overall a sharp difference between this model and M5 as BMW has clearly tried to set the models apart. The M550 has a noticeably lighter steering and suspension, is extremely quiet inside. It also looks a lot more restrained if that's something your looking for. What's surprising is that the exhaust note is pretty loud on the outside, even with the OPF filters and sounds pretty good.
In terms of power, the car feels just as powerful as the M5 from a roll. The launch is definitely much weaker and that's probably set from BMW as the car didn't feel aggressive at all.
Going more in depth in the video!