Argentina is better than Croatia but the world cup is too hard to predict. The world cup is full of surprises, I don't Croatia as a weak team, despite Argentina is a strong team they can make a mistake that will give Croatia to win.
The world cup is really difficult to predict, weak countries are really surprising us by winning the strong once, Argentina is having higher chances of winning the match, but Croatia have being surprising everyone in the world cup, any little mistake Argentina make, they might lose the match, Croatia players are really dedicated and they will try their possible best to win Argentina, it will be a tough game for the two countries, but I think Argentina should win the match.
Argentina has never lost in the semi finals and this I think is a strong indication of what is going to happen also tomorrow.If Argentina have learned from Brazil mistakes and I am sure they have watched the game of Brazil vs Croatia they are going to be playing a beautiful game and trying to win the game.
I also believe that it will be very tough for Argentina to win as Zlatko Dalic the coach of Croatia is a true soccer architect having brought them one time to the final in the year 2018 so most likely it will be a very difficult game for Argentina tomorrow.