To my knowledge, there hasn't been a Rescue Solo comic. But the comic world is vast, and new ones are constantly emerging, so it's possible it exists but isn't widely known.
The Solo Leveling comic is indeed finished. It had a definite ending that concluded the various plot elements and character developments. Many readers are still discussing and cherishing it even after the finish.
Han Solo isn't derived from a comic book. His character was created for the Star Wars movies and expanded upon in related media, but not from comic book sources. The Star Wars universe has its own complex development process that doesn't rely on comics for Han Solo's origin.
The number of Solo Leveling comic books can vary depending on editions and reprints. It's best to refer to the publisher's information or dedicated comic book catalogs to get the exact number.
It depends on personal preference. If you're more into visual art and want to see the story's epic battles and cool characters in a more immediate way, the comic is better. For instance, the fight scenes in the comic can be really exciting with the detailed illustrations.
The art style is a major difference. In the Solo Leveling comic, the visuals are vivid and detailed, which can bring the story's action scenes and characters to life more directly. While the light novel focuses more on the narrative through text, allowing for more in - depth exploration of the characters' thoughts and the world - building details.