I’ve not tried Neo Creambacks, but in general for both pickups and speakers, neodymium magnets to me don’t have as good tone as ceramic or Alnico. They’re very intriguing on paper because of the light weight and being super strong, but imo just bad tone. YMMV
Maybe a good solution would instead be a lighter weight 412. My Diezel 412FL is much lighter in weight than my other 412’s since it’s made of okoume rather than the usual birch and still to me is one of my better sounding cabs and right now loaded with V30’s and K100’s
I don’t know if I can say much yet, but there’s also this maker local to me that may come out with these very special 112’s. I’ve played them (prototypes) and they honestly sound bigger than some 412’s I’ve had and just sounded great in general. They have a special design