Thought i recognised this thread and looking back i found one from you at the beginning of March asking pretty much the same question. Only difference was an S-Max rather than a Grand C-Max being compared to a CR-V.

www.honestjohn.co.uk/forum/post/134602/ford-honda--

The general opinion then was pretty much the same as what i'm imagining you will be told now, buy the CR-V (unless of course you need 7 seats). In the case of the C-Max, i'm not sure what you find more appealing about one of them than an S-Max apart from, in theory*, slightly lower fuel consumption. But bear in mind, the 1.6 diesel Grand C-Max uses the same engine discussed in another of your threads, from the beginning of Feb, regarding the Citroen C4 Grand Picasso.

www.honestjohn.co.uk/forum/post/134137/citroen-c4-...d

*This of course depends on reliability and i'd expect a diesel S-Max to be more reliable overall than a diesel Grand C-Max which would offset the higher fuel consumption.

But i fear you will, at some point, have to bite the bullet and make a decision!