<Tr> <Th> PlayStation Vue </Th> <Td> Internet Protocol television </Td> </Tr> <Tr> <Th> Sling TV </Th> <Td> Internet Protocol television </Td> </Tr> <P> FXX is an American digital cable and satellite television channel launched on September 2, 2013, owned by 21st Century Fox through FX Networks, LLC . It is the sister channel of the larger network, FX . The channel's programming focuses on original and acquired comedy series and feature films . </P> <P> FXX launched at 7: 00 a.m. Eastern / 6: 00 a.m. Central on September 2, 2013, replacing Fox Soccer . The channel is best known for setting the record for the longest continuous marathon in the history of television, which featured every single episode of The Simpsons that had already been released at the time, which numbered over 550 . This record has since been broken . </P>

What's the difference between fx and fxx
find me the text answering this question