I've worked for both companies and both have great physicians and room for improvement. I'm thankful that my insurance considers both in network. Mercy has better rehabilitation services following an illness (stroke, car wreck, brain injury). I don't love my Mercy primary care dr though and am looking to switch to Cox but my children's Mercy pediatrician is the best ped in Springfield. I also absolutly love my Mercy OBGYN. However we've had better luck at Cox Urgent Care (The Turner Center) for kids and adults vs Mercy urgent care.

I didn't really answer your question (sorry) but I agree with the above - people in Springfield are usually passionate about which health system they prefer.

If you are lucky enough that your insurance covers both systems then don't be afraid to mix and match.