Ford has a partnership with Mazda, he current 6 (which I drive) shares the same platform as the current Mondeo. However looking at the pic you've posted I'm not sure that's going to be the case this time as the concept for the 6's replacement is a bit radical..
2013 Mazda 6
(http://cache.jalopnik.com/assets/images/12/2011/11/xlarge_3979337207aee1c9003c89f6e9f23195.jpg)
(http://cache.gawkerassets.com/assets/images/12/2011/10/mazda-takeri-concept-01_01.jpg)
(http://www.unnen.com/wp-content/uploads/2011/10/New-Taste-of-2013-Mazda-6-2-500x310.jpg)
Think I'd have the Mazda again over that Mondeo if it looks anything like the concept.
only thing with Maxdas is really poor build quality
RX7, had 2 at work, they are piss poor on the interior, leather is like paper haha.. Slow as f**k too
Id take a Ford over a mazda anyday.
Maybe in the past (which I have no experience of). I nervously chose mine over a MK6 Golf but can safely say I love it and have had no issues with build quality, it's had 50k worth of me beating the sh*t out of it so far and its still as smooth and rattle free inside and out as it was when new. Quietest yet most responsive derv of this class I have driven yet and I've had a few. It's certainly not slow. I think they have come a long way in recent years.
(http://s7.postimage.org/kxi9z2ltn/Mazda_k9.jpg)