The link above, as of early July when this post was being drafted, asserted that the X-Type had only about 20% of its components from the Mondeo. Also noted was a Financial Times interview with styling director Ian Callum who stated that nearly all the styling was done in Detroit, not at Jaguar.
As it eventuated, the X-Type sold fairly well compared to Jaguar's more up-market models. But sales levels were far below expectations and the X-Type was eventually dropped after that Mondeo was phased out.
In the Gallery below, Mondeos in various poses are shown along with X-Types in similar perspectives so that the extent of the facelift can be seen. Ford's effort clearly went far beyond simple "badge engineering" (superficial detail changes between brands using the same body platform).