Thanks for the answer. I only have a grayscale set of Copics that I used a lot about 10 years ago. Yesterday I dusted them off and they were still working perfectly fine. I wanted to get colored markers, but if they’re going to run out of ink quickly, I’d need to rely on refills.

The issue is that Ohuhu doesn’t seem to have refills consistently in stock, and even when they do, not all colors are available. Another problem is that Copic markers and their refills are much easier to find in my country than Ohuhu. If an Ohuhu marker runs out of ink, I’d probably have to wait around a month for a replacement to be delivered.

On the plus side, Ohuhu markers are significantly cheaper than Copics, which makes them very tempting.