Yes, that is one of the three publications that I was referring to. To consolidate links, here they all are:
There are inconsistencies between years though (for example in 2019 they say the Long (base 5 car) train will have 285 seats (pg.14) but in 2020 they say the Base has 87 Business & 194 Economy seats, which totals 281), so either there is a mistake or things are evolving.
Transport Action Canada also has an interesting article, but I don't consider them a reliable source of information, so I wouldn't consider anything they say to be cannon (it might be a nit-pick, but they call the long distance variant of the Charger the ALD-42 instead of the ALC-42).
Overall, until we see the final product, everything is subject to change, regardless of the source.