Both shows ran to two hours in length, but ITV1 scheduled 'X-Factor' an hour later than its BBC One rival, at 8-10pm.
'Strictly Come Dancing' attracted a 33% share of viewing with 8.4 million tuning in at 7-9pm, as Jo Wood was voted off the show.
But ITV1 enjoyed a 44% share during 'X-Factor's airtime and during the hour that the two shows were head to head 'X-Factor' led by 11.1 million viewers to 7.9 million.
Sunday's audience was even bigger, with 13.4 million tuning in to see a public vote eject girl group Miss Frank from the contest, dwarfing the 5.2 million audience for BBC One's 'Antiques Roadshow' in the same 8-9pm slot.
In the 9-10pm slot ITV1 scored another substantial victory after 'Doc Martin' brought in 8.7 million viewers and a 33.8% share.
BBC One took second place with the conclusion of its four-part costume drama 'Emma' garnering 3.7 million viewers and a 14.2% share.
Channel 4 offered the premiere of high school comedy 'John Tucker Must Die', managing 1.6 million viewers and a 7% share at 9-10.40pm. Another 200,000 people watched it on Channel 4+1.
This put it ahead of Five, which averaged 1.2 million for movie 'Bad Boys II', but behind BBC Two's 1.9 million audience for 'Charley Boorman: Sydney to Tokyo by Any Means'.
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