My own cat had cancer with a growth the size of a grapefruit and not really able to be saved, much like poor old Squeaky Jones. There's a deal of difference between a cat with three paws that can still have a reasonable quality of life and one who has a terminal illness and is in immense pain.
Circumstances alter cases and all that.
I know sorry,I have terminal guilt that I didn't listen to the other vet,They were in the same practice so I went with the hopeful one.I am sorry for your cat too,we love them so much.
I wanted her to pass away gently of old age,but really I was being cruel when she could only drink from my hand.