There is the original X3 and the newer X3. Both share the same model number. The original version holds both canned and custom tunes just like the SF3. The new version X3 only holds custom tunes. To determine which X3 version, look at the serial number. The original X3 has the serial number start with "X3". The newer X3 serial number starts with "XP".
I have the original X3, the canned tunes are Trans Only, two Tow tunes, Street tune, and Performance tune.