I have never measured one of these in my lab so take my comments with a grain of salt. The concept of one lug, drum tuning has been a holy grail for inventors. Unfortunately it suffers from the same flaws as all mechanical drum tuners (lug torque, head tension, etc), namely that drum edges and heads are not mechanically perfect, so tuning based on mechanical tension being the same "may" not work well. I don't expect any specific problem from the mechanics of the tensioning approach affecting tone, only that everything associated with it, needs to be perfect too, so clear quality could suffer.
Hopefully the drum still has individual lugs for fine clearing. Snares are typically tensioned higher than toms so upper resonances may be muddied by imperfect clearing. OTOH a rigid metal shell for snares is generally a good thing, since less energy is lost to the shell flexing. If there is no facility for fine tensioning around the drum head, I would be apprehensive about what to expect.
JR
