Personally, I don't think one can compare. I'm a breast cancer survivor; I had a very aggressive type, and my docs told me a few years later that they didn't think I'd survive. Yes, cancer can go into remission, yet one is always aware that it could rear it's ugly head again. Every lump, bump and new funny ache immediately makes me wonder if it's cancer. I have a number of nasty residual side effects from treatment that won't ever go into remission. It's not a daily concern, or something I dwell on, but the damage to my body is ever present. I'll never consider myself 'cured' (for good, scientific reason - if you're interested you can ask).
Diabetes is present 24/7/365. The difference, for me at least, is that I have some degree of control. I can choose how well to manage it, I can, to some extent, research and choose my own treatment. The daily management will never go away.
The biggest difference to me is in the public's perception and acceptance of cancer vs diabetes. Cancer (generally) doesn't come with stigmas or judgments by others. The breast cancer community has created a huge movement, while we PWD have not. So many of us are in the closet for fear of those stigmas and judgments by others (like 'at least it's not cancer'). The pink ribbon is iconic, recognized and embraced by society, businesses, etc. Our blue circle elicits 'What's that?' I'd love to see us become as powerful a movement as the breast cancer community.