From the OECD and WHO websites. There are many other sources also available on a variety of websites.
You will need to look beyond the basic data on healthcare provision. Look also at income per capita and any other measures you think are relevant. You will find some differences. Try to work out how important they are to the overall. To produce a first class piece, you will need to go beyond the health care system, and look briefly at the political and economic circumstances in the two countries.

What economists are really interested in is how well-off people are, and that doesnt just mean monetarily well-off.*Text book name: Palmer, George R. and Maria Theresa Ho Health Economics: A Critical and Global Analysis (Basingstoke: Palgrave, 2008)