I imagine it’ll be different strokes for different folks. Both have their strengths and weaknesses. I’m probably gonna beat a dead horse here, but anyway…
For me, I don’t use captures very often. I prefer configurable amp sims, plugins, and effects blocks for my workflow, such as for parameter changes between scenes.
If you build your sound around captures, both will be excellent but the QCm has the slight advantage of being able to do it directly on the device.
Where the Anagram is especially strong for bass is the number and quality of bass-specific gear choices: amp sims, distortions, cabs and IRs, etc. Made by bassists for bassists. And they’re largely dialed in with a great sound by default. As these are what I primarily use in my presets, this reigns king for me.
Anagram gives you what you need for bass and none of the fluff you don’t, like guitar-centric stuff or a rather lame choice of amp/cab sims, IMO, even given the already extremely low number available on QCm. It’s almost like NDSP chose the amps and cabs based on what a guitarist might think a bassist would want rather than directly from a bassist.
If you double on guitar, QCm is definitely the winner, but this is talkbass, not talkguitar

I dabble so will be using some of those features occasionally, and primarily the NDSP plugins I like to use.
Having Parallax is also VERY nice, especially if you record with it and want your studio sound live exactly as it is on the record.
I can definitely see where one might choose one over the other. I’m lucky enough to be able to keep and enjoy both.

And I’ll be A/Bing them in the band context over the next weeks as well. Who knows what might change?