My money is that SA has the distribution rights for majority of the global market. That's why HT is only retailing in Japan.
But - this is a total business play. HT will present this to WB licencing in comparison to validate their product as superior and try to outbid the SA license. I would be almost certain that's the case. Because there's plenty of Depp licenses to go around, HT didn't need to do Grindelwald. This has more behind it, it just helps that Depp is part of it. So I don't think this argument that HT just rides Depp's coattails is necessarily the whole picture.
I wonder who did the Newt sculpt for HT, since we know KA Kim did SA's. I wonder if SA made her sign that she couldn't produce the same character for another company.
All things considered I still prefer the teal jacket. But that's just a preference. If HT wanted to drive it home they'd have done a bonus set with brown pants and the teal coat.