last time the EFF got permission to jailbreak phones to add additional software on them.
this time they are asking to not only put additional software on the current OS, but also to be able to replace the OS. They are also extending this from phones to include Tablets and Game consoles
the SFLC is asking for the same permissions as the EFF, but they are asking for the rights to do this on any device you own, not just the subset the EFF is asking for.
note that nothing that either organization is asking for requires that companies make it easy to replace the OS on the devices, the companies would still be free to lock the devices down with the firmware checking signatures on the OS image and on up.The only thing that would change is that people who break the restrictions the companies put on the devices could not be threatened with jail time, etc for violating the DMCA