Ronaldo did nothing in that 2018 CL final (or semi final). Messi did have a stinker against Roma but he was the better player that year and won Barca the league.
I don't think either were great in 2014 but at least Messi helped Argentina to the World Cup final and scored what should have been the title winning goal against Atleti but was robbed. I wouldn't chose either over the other though in 2013 or 2014.
Ronaldo: 2008, 2016, 2017
Messi: 2009, 2010, 2011, 2012, 2015, 2018, 2019
I've given 2016 to Ronaldo but the sheer luck he had in CL/Euros was insane.
serghei is Ronaldo fan, no need to waste time.