I literally linked those two polls just yesterday, hah [0]. Did you see my comment, or did you just happen to do a similar search and get those results?
As I mention in my other comment, I speculate the possibility that people think "Single payer" and "Medicare For All" are different things [1] and so report a different opinion on each, similar to how the ACA was viewed MUCH more favorably than ObamaCare despite one being the nickname for the other.
[1] ACKSHUALLY, single-payer doesn't HAVE to be simply expanding Medicare to everyone. It could be done in some other way, but the core idea of the government paying for everyone's healthcare is still the same.
As I mention in my other comment, I speculate the possibility that people think "Single payer" and "Medicare For All" are different things [1] and so report a different opinion on each, similar to how the ACA was viewed MUCH more favorably than ObamaCare despite one being the nickname for the other.
[0] https://news.ycombinator.com/item?id=31755822
[1] ACKSHUALLY, single-payer doesn't HAVE to be simply expanding Medicare to everyone. It could be done in some other way, but the core idea of the government paying for everyone's healthcare is still the same.