– BOINC transparently and securely downloads new application versions.
– BOINC has a more flexible data architecture than SETI@home Classic.
– BOINC distributes work based on host parameters.
– Other distributed computing projects are also using BOINC, and you can share your computer time among projects of your choosing.
I won’t upgrade until I need to. They haven’t set a date yet for when the classic version will no longer work.