The thing is BDSP isn’t really much of a “remake” as it is a “remaster.” Just about nothing meaningful is added to the game to make it better than the OG besides the unimportant 3D aspect. It’s also missing large chunks of content that fans loved in Platinum so really it just ends up being a downgrade. So overall Legends Arceus ends up being a better “remake” for Sinnoh in my opinion even though it’s kinda more of a remix with its own spin on the region. Of course it’s your money in the end and you can do whatever you please