The choice starts with your daily habit

A color E Ink device can sit in two different routines: reading books for long stretches, or moving between documents, annotations and notes. The BOOX Note Mini C and Kobo Libra Colour overlap enough to make that a useful choice, but their strongest reasons to buy come from different tasks. Decide which routine will occupy most of your time before deciding which feature list looks more appealing.

Color alone does not settle this comparison. Both use Kaleido 3 color E Ink with an announced 300 ppi for black-and-white content and 150 ppi for color. If you are already satisfied with that color density, moving between these devices is not an upgrade in color pixel density. The more useful question is whether you need a larger working canvas or a lighter reader with physical page controls.

Put your most repeated task first

For document work, the BOOX combines an 8.52-inch display, Android 16 with built-in Google Play, and an included InkSight active pen. That combination gives it the clearer fit when annotating documents and using specific Android apps are recurring needs. The larger screen is a reason to consider it as a working surface; it is not evidence that its color pixels carry more detail than the Kobo’s.

The app part of that decision needs a concrete check. Built-in Google Play is a route to apps, but it does not establish that every app is available in your region or suitable for your workflow. Identify the apps your reading and note routine actually depends on, then check their availability and suitability before making those apps the reason to choose the BOOX. An app you might try someday is a weaker basis for this choice than a recurring task you can name.

For a routine dominated by books, the Kobo’s lower device weight and page-turn buttons are more directly relevant. Those features support the case for a reader you will repeatedly hold and turn pages on. You can still consider handwriting, because it supports Kobo Stylus 2, but that stylus is sold separately. It therefore makes sense to decide how often you will use a pen before treating pen compatibility as a deciding advantage.

What the differences mean in use

The screen-size comparison is 8.52-inch for the BOOX against 7-inch for the Kobo. The BOOX provides a larger canvas, which matters when the document and your annotations share the screen. The Kobo offers the smaller canvas. Neither size changes the shared black-and-white or color pixel density, so separate the amount of screen space you want from the density of the display itself.

The weight tradeoff accompanies that extra canvas. The BOOX device weighs approximately 300 g and the Kobo device weighs 199.5 g, with accessories excluded from both figures. Keep the approximation on the BOOX number, and use these figures to compare the devices themselves. They do not tell you the final carrying weight after adding a cover or pen. For mostly book reading, the Kobo’s lower device weight is a concrete reason to favor it; for recurring document work, decide whether the larger canvas earns its place in your bag.

The BOOX’s InkSight active pen is included in the international standard bundle and charges through USB-C. That makes the pen part of the standard starting setup, while adding a charging task to your note routine. This bundle claim is about the pen, not a promise that every accessory you may want is included. With the Kobo, Stylus 2 compatibility gives you a pen option, but buying the stylus is a separate step. The difference is whether a pen is part of the standard starting setup or an additional purchase.

The Kobo also has a stated IPX8 water-resistance rating: up to 60 minutes in 2 m of water under the stated test conditions. That is useful information when a stated water rating matters to your reading choice, but it is not a guarantee for every liquid or situation. Keep the depth, duration and limited conditions together when weighing this feature.

This is a specification-based comparison of international models, with no matched independent testing to establish a battery-life, pen-latency or app-speed winner. The BOOX water rating is unverified here, which does not establish that waterproofing is absent. Regional app checks remain necessary, and this comparison gives no mainland-China service or availability guarantee. It also has no matched total cost, so the included BOOX pen and separate Kobo stylus do not establish a price-value winner. Use the documented differences to choose a workflow, without turning these evidence limits into performance or market claims.

Which one fits your routine?

Choose the BOOX Note Mini C when document annotation is a regular task, the larger canvas has a clear purpose, and you have checked the specific Android apps you need. Its included pen strengthens that fit if handwriting is part of the routine and you are willing to keep the active pen charged. The case is strongest when those needs recur together.

Choose the Kobo Libra Colour when most of your time will go to books and you care about lower device weight, page-turn buttons or its stated water rating. If you also want to write, include the separately sold Kobo Stylus 2 in your purchase planning.

My recommendation is to choose the Kobo for a book-first routine, and choose the BOOX only when recurring document and note tasks justify its larger canvas and you have verified the apps your workflow needs. If your note needs are only occasional, the BOOX’s extra canvas and app access are weaker reasons to accept the heavier device. Make the task you do most often the deciding factor.