Some departments choose different numbers for their R&C courses because they have other courses numbered 1.
http://haas.berkeley.edu/Undergrad/ucb_prereq.html links to http://guide.berkeley.edu/undergraduate/colleges-schools/letters-science/reading-composition-requirement/#RC which lists the various acceptable R&C courses.
(The last sentence means that you cannot use Classics R44 for both R&C and 7-course breadth for the business major, although you can if you are in L&S.)
High enough AP English scores may be also be used: http://haas.berkeley.edu/Undergrad/aplist.html