The Raven 4 is a plastic case fitted with a "Hi-Flow air filter" that Silverstone maximizes airflow, offering improvements of up to 30 compared to previous solutions, and improved dust buster capabilities. Silverstone has removed the rear grill to improve air flow and these two differences help Silverstone reach the same cooling performance of the previous model with one fewer fan. The FT04 is the same case but it's fashioned out of aluminum as opposed to plastic.
Silverstone also had on hand a new mini-PC called the SG-09 with a 23 liter capacity as well as a micro-ATX motherboard, a standard PSU, space for two HDDs and four SSDs, two fans, standard length VGA cards, and two USB 3.0 ports on the front.
The Raven 4 will be available in Q4 priced at €130, while the aluminum FT04 will cost €180/€200 (also available in Q4).