perhaps this will work. sorry for graphics learning curve.
Actually, in the above (successfully..;)linked graph, the combustion component of various fossil fuels vs liquids from coal are all about identical (makes sense). Its just that the refining component for CTL creates much larger GHG (the purple area). As a component of total GHG emissions, CTL looks to be 6 times the amount of marginal GHG than natural gas or crude oil, even though the choice to use fossil fuel liquids itself is much of the GHG equation.

sasquatch's image -click to see bigger version