At first glance the COSMOS II looks very similar to the original case as it has the top and bottom rails still, but beyond that it is very different. For one thing it is bigger in all dimensions with the original Cosmos at 10.47(W) x 23.54(H) x 24.72 (D) but the new and improved Cosmos II Ultra Tower stands a whopping 13.5(W) x 27.7(H) x 26.1(D). This is larger than most cases classified as a Full Tower which is why Cooler Master came up with the Ultra Tower category..."
Slow computer got you down? Maybe a hardware upgrade should be in your cards, if so this guide to the Fundamentals of Upgrading a PC is an invaluable read. PCSTATS Tips