Comparing speeds between CF and SD cards can be difficult, as there are many different class ratings for both. Generally speaking, however, CF cards tend to have faster read and write speeds than SD cards. This means they are ideal for tasks requiring quick data transfer, such as transferring large files or recording 8K video. Additionally, all CF cards can use the UDMA protocol together with the correct reader equipment; this makes them especially well-suited to tasks like quickly capturing still images or engaging in burst photo shoots. All in all, it's easy to see why CF cards are the go-to choice when users need extra speed.