Great info. I can’t wait til mine arrives.Today was a "control" day, I shaved with the Mamba (fresh Med Prep) and RR Saturnia.
Due to both angles and actual mass the Mamba feels a bit more nimble, but the only functional difference is a slightly higher starting point just under my nose... The BBS takes more whisker off in the first WTG pass than the Mamba, but after the second (ATG/XTG hybrid) pass there's no practical difference. While the Mamba is a great razor ATG, the BBS is even better (as I had suspected), but again, it's almost academic since both can handle my neck and jawline at speed without any worry.
12 hours later, the shave from the Mamba feels identical to the one I got from the BBS yesterday, so both are getting right down to the practical limits of everyday closeness (I'd have to spend an extra pass and significantly more care to get a shave that still felt close this long afterward with a Gillette TTO or Muhle).
The Mamba wins under my nose and lower lip, BBS beats it ATG under jawline and they're tied on cheeks and neck.
Next I'll fall back to the GC, if my hunch is correct, it'll be a bit less close than either of these, but the shave will still be excellent and I'll get that with only a casual level of concentration (the half-asleep shaves from the Mamba aren't this close).
It's definitely a keeper.