The Q300L and Q300P are versatile cases, and since they share the same chassis, you have the same options for a system build. Both cases can be used in a horizontal orientation for a low profile look. The big difference is with the Q300P. With it you get two front 120mm RGB fans, as well as a backlit RGB angled top panel. Of course, there are also the top handles and feet at the bottom. Finally, there are the smoked top and front cover panels. Those additions to the Q300P make it an attractive case. The Q300L is not bad at all - aesthetically it is just a bit more mellow than the Q300P.