Write SQL query to solve given problem: What is the difference in the current gross of Cars and its sequel, Cars 2? Which movie is more popular?. Keep the solution inside sql tag ```sql [SQL-Query] ```
SELECT SUM(CASE WHEN movie_title = 'Cars' THEN CAST(REPLACE(trim(inflation_adjusted_gross, '$'), ',', '') AS REAL) ELSE 0 END), SUM(CASE WHEN movie_title = 'Cars 2' THEN CAST(REPLACE(trim(inflation_adjusted_gross, '$'), ',', '') AS REAL) ELSE 0 END) FROM movies_total_gross