For me, it came down to HDR. Originally, I used the Canon VR Utility to import recordings as ProRes. But, there was no way to get HDR from that. If you import the .CRM files directly into Resolve, you can take advantage of the full CLog3 Colorspace and transform to HDR.
When I saw the "Sessions" video published on the Prima app, it really woke me up to what HDR brings to the table. Granted, they're using a COMPLETELY different camera with other advantages. But, the point stands - HDR made a huge difference.
I'm quite happy with the quality I'm getting from the R5c, with a full HDR workspace and other tricks.
So, I'm wondering - when you record to the Ninja, do you get full HDR or Log colorspace? Personally, I don't know, but I don't think you can.
If you do care about the HDR workflow and you need more details, I'm happy to share.