Did some research and this is what I've come up with. Hopefully, I didn't leave any games out from '02-'10. From the looks of it - the PAC 10 and the SEC have had some pretty even results. Obviously, Tennessee losing three consecutive games to unranked PAC 10 teams hurt the SEC in this argument.
2002: Auburn (9-4, #16) @ USC (11-2, #4) - USC wins 24-17
2002: Mississippi State (3-9, NR) @ Oregon (7-6, NR) - Oregon wins 36-13
2003: USC (12-1, #2) @ Auburn (8-5, NR) - USC wins 23-0
2003: Arizona (2-10, NR) @ LSU (13-1, #1) - LSU wins 59-13
2003: Oregon (8-5) @ Mississippi State (2-10, NR) - Oregon wins 42-34
2004: Oregon State (7-5, NR) @ LSU (9-3, #16) - LSU wins 22-21
2005: Arkansas (4-7, NR) @ USC (12-1, #2) - USC wins 70-17
2005: LSU (11-2, #5) @ Arizona State (7-5, NR) - LSU wins 35-31
2006: USC (11-2, #4) @ Arkansas (10-4, #16) - USC wins 50-14
2006: Cal (10-3, #14) @ Tennessee (9-4, #23) - Tennessee wins 35-18
2006: Arizona (6-6, NR) @ LSU (11-2, #3) - LSU wins 45-3
2006: Washington State (6-6, NR) @ Auburn (11-2, #8) - Auburn wins 40-14
2007: Tennessee (10-4, #12) @ Cal (7-6, NR) - Cal wins 45-21
2008: Tennessee (5-7, NR) @ UCLA (4-8, NR) - UCLA wins 27-24
2008: Georgia (10-3, #13) @ Arizona State (5-7, NR) - Georgia wins 27-10
2009: LSU (9-4, #17) @ Washington (5-7, NR) - LSU wins 31-23
2009: UCLA (7-6, NR) @ Tennessee (7-6, NR) - UCLA wins 19-15
2009: Arizona State (4-8, NR) @ Georgia (8-5, NR) - Georgia wins 20-17
2010: Oregon (11-0, #2) @ Tennessee (6-6, NR) - Oregon wins 48-13
PAC 10 vs SEC: 10-9
PAC 10 Ranked vs SEC Ranked: 2-1
SEC Ranked vs PAC 10 Non Ranked: 7-1
PAC 10 Ranked vs SEC Non Ranked: 3-0
SEC Non Ranked vs PAC 10 Non Ranked: 1-4
Team Record:
Auburn: 1-2
Arizona: 0-2
Arizona State: 0-3
Arkansas: 0-2
Cal: 1-1
Georgia: 2-0
LSU: 5-0
Mississippi State: 0-2
Oregon: 3-0
Oregon State: 0-1
Tennessee: 1-4
UCLA: 2-0
USC: 4-0
Washington State: 0-1