So I am a sucker for deltas, so check out the difference between the 2019 X5 50i and the updated 2020 X5 M50i.
https://www.caranddriver.com/reviews...rive50i-drive/
https://www.caranddriver.com/reviews...y-the-numbers/
2019 0-60 4.2 (without roll-out I assume?)
2020 0-60 3.9 (3.7 with rollout)
2019 1/4 12.7@109
2020 1/4 12.4 @ 112
similar difference between the N63TU2 and N63TU3 750i.
Safe to say the new engine improves the trap speed by about 3 mph and drops the e.t. by about .3 to .4 sec.