This is a new comparison of two CO2 references with the BEST and CruTemp4 land surface temperatures by season. I have tried a few modification to get the charts and "control" buttons centered, but frame size is a bit limited with this blog template. This is an attempt, only and attempt, so bare with me.
If the buttons are not live, then you can try downloading the spread sheet by clicking on it. Not much to the spreadsheet though, just two ln(CO2) curves with the seasonal which is pretty easy to throw together.