It's just that the Simple Medical Box is disposable, whereas this one can be used permanently.
Moreover, using the "Simple Medical Box" to sew severed limbs still requires a dedicated individual to handle it. It doesn't matter if they're not professional surgeons; if suturing goes wrong, you can just take it apart and sew it again. After dozens of attempts, you'll eventually get it right.
The whole process is a bit painful.
The possibility of dying from pain is low.
Passing out from pain should be no problem.
With the "Medical Cabin," however, you don't have to worry about this issue. For the same limb regeneration, simply put the severed limb and patient together into the Medical Cabin, cover it up, and after a minute, the limb will already have regenerated. The whole process is pain-free and extremely easy.
Of course...
For limb regeneration as well, the resources consumed by the Medical Cabin are definitely higher than that of the "Simple Medical Box."
