Real Madrid have the same ability to win the Champions League as they do the UEFA Super Cup.
Moreover, if we consider between these two teams in terms of players, then Real Madrid will be the most advanced. Because some of the world-class forwards in the Real Madrid club are capable of turning the tide of the game at any time. They include Vinicius Junior, Rodrigo, Kylian Mbappé. Moreover, Jude Bellingham, Luka Modric are also used to perform well as midfielders.
Real Madrid have very good tradition and currently their squad is very strong too. If they win Champions League, they have a strong squad with which they are likely able to win Super Cup so it makes sense to see they often win Super Cup after winning Champions League one season ago.
With players you named, Real Madrid have many star players who can decide the match against Atalanta but the Euro 2024 and Coppa America 2024 can affect their star players and their readiness for a new season. It gives Atalanta chances to make surprise in Super Cup match this year.
Atlanta and Gian Gasperini done good job before two big games, and they never allow them to have any resistance against them with both time their strategy works, and they pulled out Liverpool then have won against Bayer Leverkusen in final game and clinch the trophy with no one expecting them to have win like this, but they have done and now having good chance of giving good performance at this level because they are having good squad and their player's chemistry is also good for facing big clubs.
Atalanta won Europa League by beating Liverpool and Bayer Leverkusen but as I knew in the last season, Gasperini planned to leave Atalanta. Did he change his mind and decide to stay with Atalanta?
Quick check with Transfer market, the coach is still in Atalanta.
https://www.transfermarkt.com/gian-piero-gasperini/profil/trainer/3436It's hard for Atalanta to beat Real Madrid than beat Bayer Leverkusen because Los Blancos is a bigger and more successful club than Leverkusen. They are more experienced in final matches and Super Cup matches than Leverkusen too.