Stef,
I have not had TORS, but from what I understand, at least from some reports, TORS endoscopy can find the primary tumor in 80% of the cases of an unknown tumor in the oropharynx. Robotic surgery may also have less incidence, if any, for a trache procedure during surgery, a lesser hospital stay requirement than conventional surgery would, and fewer peg tube requirement/length of use, and better swallow function, after treatment, if any, such as radiation, if it helps any.
The are just averages or from particular study cases, and it depends on the individual, and other factors, such as how surgery goes, but your doctors are more experienced with this, and know your particular case, and general health. Maybe someone who had TORS or this type of surgery can offer than insight.
Good luck