There were many brands and models in the e-book market. The choice of which one was better depended on one's personal needs and preferences. Here are some suggestions that might be helpful: 1. Reading needs: First, consider your reading needs such as novels, comics, light novels, etc. Different types of books had different requirements and adaptability for e-paper books. If you need to read a large book, then the e-paper book may need a higher resolution and a larger screen. 2. Screen size: The screen size of the e-paper book also has different choices, such as the common 6 inches, 8 inches, 10 inches, etc. You can choose the right e-book according to your reading habits and screen size. 3. Reading experience: The reading experience of e-paper books is different from that of traditional e-readers such as the iPad. For example, it is easier to perform hand gestures, page flipping, searching, and so on. You can also consider reading applications, which can provide additional reading functions such as annotations, notes, translation, and so on. 4. Price: The price of the e-book is also one of the factors that need to be considered. The price of different brands and models of e-books varied greatly. You could choose the right e-book according to your budget. Based on the above considerations, if you mainly read comics and light novels and want a bigger screen and a better reading experience, then Jinshu might be more suitable. If you were more concerned about the price and wanted a multi-functional e-book, then Baiguan might be more suitable. The K10 was a relatively new e-book with better battery life and higher resolution, but it was likely to cost more.