Both Messi and Ronaldo countries don't have the best team on paper in this world cup. This is likely their last worldcup but these legends might still want to have few games with their national side after the world cup. In terms of an identity, cohesion and commitment, the Argentina team seems to be slightly better than that of Portugal and hopefully it will be a great worldcup for Messi.
Messi may be superior in terms of player quality compared to Portugal but there is a possibility that there will be an increase in the rating of each player in the next World Cup match, because every player has been training hard to present victory for their respective country in the World Cup match, so my prediction is the country of the two superstars possible entry for the quarter-final match.