Unlike UAH, RSS found 2016 to be a record breaking year, +0.17°C (0.31°F) warmer than 1998. (2010 is third warmest.)
"In addition, 9 out of 12 months for 2016 were the warmest of that
month ever recorded in the satellite record.....
"The record warmth was caused by long-term global warming combined with the strong El Niño event
that occurred in the winter and spring of 2015-2016. "
They're measuring slightly different regions -- RSS's number is for the Temperature Total Troposphere (TTT), whereas UAH's number is for the lower troposphere. And slightly different sections of the globe -- RSS's measurements go from a latitude of 80 south to 80 north, whereas UAH covers the entire globe, 90S-90N.
(to be continued)