Members of The Church of Jesus Christ of Latter-day Saints who have been invited to sign up for a free Ancestry.com account now have the ability to move information directly between their Ancestry.com account and FamilySearch.org's Family Tree. Here is a screen shot showing the new feature;
The note at the bottom of the page indicates that "The ability to compare and transfer relationship and sources information is coming." In this particular case, the comparison pointed out a long-standing issue. On the FamilySearch Family Tree side (the left side in the screenshot) there is a date listed for a "Christening." Christening is not an ordinance performed in The Church of Jesus Christ of Latter-day Saints. So this is an invitation to me to correct my ancestor's record on Family Tree.
I personally am looking forward to begin the process of moving sources from Ancestry.com to Family Tree.
In order to make these comparisons, it is necessary to have an Ancestry.com Family Tree. Presently, you can move a family at a time from FamilySearch.org Family Tree to Ancestry.com to start the process of doing research for sources on Ancestry.com.