Overnight viewing figures for both shows reveal that more than 2 million watched the BBC series as the programmes went head to head.
On first, Strictly's second live show of the series had a whopping average of 9.2 million viewers.
That's up a massive 1.3 million on last year - although that did clash with an England Rugby World Cup Match - and 200,000 up on 2014.
The X Factor began at 8PM, while Strictly was still on air, and posted an average of 6.8 million viewers.
There was no Saturday show in 2015 due to the aforementioned Rugby World Cup on ITV, but in 2014 the equivalent episode had 7.3 million viewers.
In terms of peak audiences, Strictly had up to 10.3 million viewers watching compared to The X Factor's 8.1 million.
Even though there was no clash last week, Strictly was up 600,000 viewers on last Saturday while X Factor dropped 300,000 viewers.
The two shows clash again tonight with Strictly's first results show and the second half of The X Factor's judges houses.
And the head to heads continue next Saturday night when The X Factor goes live for the first time this year.
Elsewhere last night, Go For It on ITV had 2.1 million viewers against Strictly before X Factor while afterwards, Newzoids had 2.5 million and Jonathan Ross 1.9 million.