Just some thoughts to hang on to (now I am over the shock and able to think a bit more clearly).
*Sounds like the SCC is tonsillar which may mean that it is more accessible to surgery and less functionally destructive than BOT.
*If SCC is tonsillar, total glossectomy might not be part of the plan.
*Moderately differentiated suggests a better outcome than poorly differentiated.
*You have had a few years to regain your health so you are better equipped physically than the second time around.
*You have a direct line to the best "go to" team.
*I assume this was caught early so hopefully treatment might not be so severe.
*You are the perfect advocate for your own treatment

I know that you know all this but hope that if you see it written down, you will be better able to focus on it.