@Brou That's a bunch of misleading nonsense. The real-world range of a 2021+ M3P is higher than an i4 M50. I've seen multiple review tests show that.
Also that 256 range result is from a 2018 M3P. I think the only
drastic efficiency improvement since then is the heat pump, and I'm not sure if cabin heat gets used in EPA testing, but I still wouldn't use 2018 results to judge a new 2022 model! You know Tesla is tweaking these cars all the time. Even the EPA rating is slightly higher for 2021+ M3P than 2018. (But I agree, can't assume EPA rating difference correlates to real-world difference.)
Last but not least, apparently Edmunds admitted to only charging a Model Y to 90% for a range test, while charging all non-Teslas to 100%. I'm not finding a detailed Edmunds article on that 2018 M3P test to say whether they actually charged it to 100%. I believe lately Edmunds has been consistently charging Teslas to 100%, for their most recent range tests, but I don't trust that 2018 Edmunds test, because of how the sandbagged the Model Y in an older test.
All that said...it is very annoying that EPA range estimates can't be trusted as a useful comparison. I agree wholeheartedly that's an issue! I wish the EPA would tighten up their rules to minimize that. But that doesn't change the fact that the M3P is truly more efficient and longer-range than the i4 M50, even if the difference isn't as big as the EPA ratings suggest.
Do you have a Model 3? Are you replacing it with an i4? I'm pretty excited for the i4 to start selling here. From the comparisons I've watched and read (from Europe where the i4 was launched earlier), I think my 2021 M3P is more to my taste (i4 M50 test drive needed to confirm that though!), but I do think I'll like the i4 too and it'll be a solid addition to the US EV market.