Yes, it's definitely worth reading. The story is full of adventure, with a unique take on the isekai genre. The main character, Naofumi, is an underdog who has to face many challenges and prejudices, which makes his growth throughout the story very engaging.
It depends on personal preference. If you like a more visual and fast - paced experience, the manga might be better for you. The illustrations can quickly draw you into the story and the action scenes are exciting to look at.
One major difference is the pacing. The manga often has a faster pacing compared to the light novel. It might skip some of the more detailed explanations and character introspections that the light novel contains. For example, in the light novel, there are more in - depth descriptions of the world - building elements, like the magic system and the history of the different kingdoms. In the manga, these aspects are sometimes simplified to move the story along more quickly.
Personally, I think both have their own charm. The manga of Rising of the Shield Hero is great for those who want a more fast - paced and visual experience. It can quickly convey emotions through the characters' expressions. The light novel, though, is wonderful for those who like to use their imagination more. You can create your own mental images of the characters and settings while delving into the detailed descriptions of the story. So, neither is objectively better; it's all about what you as a reader are looking for.
The art style is a major difference. The manga has visual illustrations that can quickly show the appearance of characters and the grandeur of the fantasy world. In contrast, the light novel relies more on detailed descriptions.