I have experience in hospice nursing, but currently work in an inpatient oncology unit. In my experience there isn't a very big difference between the hospice and oncology population. Most of my oncology patients are dying, the difference being they are still holding out for a miracle treatment/fix or cure. I'm sure outpatient oncology is different, and good outcomes are witnessed more often, but as an inpatient oncology nurse, most of my patients are admitted for end stage organ failure of some kind because they are dying from either the cancer or the treatment. The other type of patients we typically see are surgical and inpatient chemo cases-these often have a better prognosis, and may result in a better outcome.
If you like the hospice population, you will most likely like the oncology population too. The part that is hard for me, is when caring for a patient who is dying and the docs are still willing to provide chemo/radiation and the family and patient want to keep fighting when you as the nurse KNOW they have hours to days left. As a previous hospice nurse, these scenarios break my heart. I do enjoy my job though and absolutely love my patients. With that said, I know someday I will go back to hospice nursing.