The M550 is so consistent in power delivery.
It feels less agile than the M5, more disconnected in some ways (handling/road feel), and not as rude of a car if that makes sense.
M5 stock for stock would slowly walk away in a 40 roll run, stop light to stoplight you can't even compare, the M550 launches every time. I used to hope I wouldn't be challenged under 40-50mph because of wheel spin
.
I think with the 2020 model you won't be missing anything stock for stock in terms of performance and you'll enjoy the xDrive aspects of the car, it's a dream in the rain and around corners if you get on it.
Transmission is just as fast as M5's was.
If your like me you'll end up with Dinan then a full stage 1 tune, resonator delete for listening and driving pleasure
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2013 535i M, Carbon black 20' 6 M wheels, totaled.
2018 750M ,
2013 M5 , Individual Silver, Bolt ons-Straight piped
2019 M550 686BK Black Chrome 20"wheels, filters, Evolve Stage 1, Res delete
2024 i5 M60 Cape York Green