When I see a person suffering from something, I personally will not react by weighing the two options to see which is better. I will find time to first listen to them and carefully weigh and consider all the things I can do to help that person., with a view of connecting them to Dharma and planting Dharma seeds in a discreet way, if they are not spiritual. Being there to listen and to give emotional support is very important. But we must also remember that Dharma is the ultimate medicine that heals all suffering by healing the root of suffering - the three poisons.
If that person is not spiritual, I'll pray for them and dedicate pujas, that I perform,to them.I will also see if there is time(if they are not dying) and nurture them in Dharma.
If that person is spiritual and understands the Dharma, then it is easier. We can effect the two options simultaneously.
My best friend turned to me when her sister was dying of cancer. THey were/are not spiritual. I put my whole love and care into what I did for her. In the end, the lady passed away, but despite her great pain throughout, she was able to let go and to die in calm and peace. She was thousands of miles away. But I got to talk to her on skype once earlier on and the second time a short while before she passed away. I chanted and blew mantras of DS on her. She recited OM Mani Padme Hum all the way. She had my Kuan Yin statue with her until the last weeks when she was hospitalized. Two weeks before she passed away, her son recorded, on video, a conversation they had together. She talked about impermanence of life,how life was fleeting ..There was so much acceptance and peace in her already.