I'm not going to speculate as to why the Truchon decision was not appealed. That said, I think there are, indeed, common grounds between the two decisions, that of Carter and the Supreme Court of Canada and the Quebec decision in Truchon.
I think one of the common grounds for the CBA is, indeed, that both courts recognized the need again to have vulnerability assessed on an individual basis by a physician. While there are risks when discussing MAID for vulnerable people, those risks, the Supreme Court says, are already part and parcel of the medical system in other kinds of end-of-life decision-making, and they could be resolved through a proper assessment of informed consent.
I'm not going to go into the technicalities of the decision, but while the Supreme Court of Canada decision was grounded as an infringement of section 7, the Québec Superior Court also found an infringement of section 15.
I hope my remarks are helpful.