Which case has better airflow, space, cable management etc.?
Like the other poster stated both of them are great cases. The 300R is a little more up to date and has a few more goodies, but both of them have plenty of room to tuck away cables while using a few zip ties. If I had a choice it would be the 300R for the extra fans and front 3.0 USB ports along with the 2.5" SSD cage.