Hi
@allenrhaas , and welcome to the forum!
I can't help you with your question, as I've used neither of those insulins. It must be a very frustrating issue.
While this is an international forum, the vast majority of our members are from the UK and Europe, so thankfully most of us don't have experience with having to choose between insulins due to cost. I guess you're in the US?
The downside of this is you may find you won't get many answers, because most of us don't have this problem.
I'm also not sure if Novolog and Novolin are used in the UK under those names.
While I love this forum and it's members, you might get more answers if you post your question on a US based forum as well.
Wish you all the best!
By the way, do you have Dutch ancestors (supposing your family name is Haas
)?