At least the Lexus is an NA motor, everything from bmw is turbocharged 
Turbo motors suck!!
Give me an NA high revving any day! Or even mustang 5.0 or Chevy 6.2/7.0
What you just mentioned will be brought up if the new M3/M4 doesn't deliver...
Plus the new M3/M4 has "Active Sound", which means that they play the exhaust note thru the speakers. Which means that it probably is a pre-recorded track, unless they have mics in the engine bay.
And you can't turn it off, either. Why are they doing this?
Because BMW's turbo engines are too muted and or getting around Euro flyby regs.