I moved to Springfield from just north of Iowa City. The cost of living here is definitely cheaper, so you will get more bang for your buck here. Iowa City is more progressive and liberal than Springfield, but Springfield is big enough that you can generally find your own pocket of people that think similarly as you. Iowa winters are a draw back for most, but I grew up there and miss the snow!

IC is obnoxiously focused on their Hawkeyes. You have to contend with large amounts of 'sports fans' (think KC Chiefs fans but more concentrated and, yeah, dumber).

Their healthcare system IS much better. They have more options and because U of I is known for its med school they have more up to date docs, imo.

Overall, I would choose Springfield!