I really like the blog by Randal Moore. The snapshots and timeslides provide great details for understanding his blog.
Blog by Kiet Vu is not that bad. Even though it is easy to read, it is too rough and not well-prepared. It does not include any graphics to make it look more interesting and attractive for the readers to read it. On the other hand, Randal Moore's blog includes some great graphics and gives him a higher hand over Kiet Vu.