If the epg of all SPN sports channels are to be trusted, the the different channels will be broadcasting different contents
Sony Six- Fully cricket dedicated Channel in English
Sony ESPN - Mix of all sports (America schools sports, Fight sports Ufc and TNA, X games, Tennis and other sports)
Sony Ten 2- Fully dedicated Football channel
Sony Ten 3- 24×7 Cricket dedicated channel in Hindi
Sony Ten 1 - Mix of all sports (America schools sports, Fight sports WWE , X games, TENNIS, CYCLING, MOTO G and other sports)
Sony Ten Golf - 24×7 Dedicated golf channel
All the SPN HD channels will broadcast the content of respective SD channels in HD.