Japan(U22) have got 2 wins and 1 defeat in the group stage, reaching into the semi-final as NO.1 in Group A.
However, they coneded goals in 3 games, which reveals their mediocre defensive performance.
On the other hand, Mexico(U22) have got 2 wins and 1 draw in the last 3 games without conceding a goal.
According to previous performances, Mexico(U22) are more consistent overall.
Coming to the final stage, both teams must be consistent and defensive, so Mexico(U22) are superior.
In conclusion, we shall expect Mexico(U22) to have the last laugh.