Ahh - makes sense. Good luck with the surgery!
The alleged name of the alleged mine is fairly irrelevant here.
If the Tomo works - it works. So yes - trying new Tomo can be enlightening.
If one Tomo works better than another Tomo - cool. If not - it won't be because of the name of the mine it supposedly came from.
FWIW - I use Naka Tomo on my Shobu all the time. I also use Shobu Tomo on my Nakas all the time.
When I really wanna get a little crazy - I putta little Okudo Suita on both of them.
Depends - good Chu is wonderful.
Crappy Chu is another story.