The difference between the two Wiki sites seems to be limited to a comment on the Beta site:
Newsflash! A new facelift will appear on the Wiki by 8 am (EST) Friday, July 30. We hope you like the new look! Please post comments and questions in the forums. Q & A'sThere is a link to Q & A's but the link has a statement that "there is currently no text on this page." So, apparently, there are two different Wiki sites out there, one is linked to the old FamilySearch.org page through the Record Search Pilot and the other is indirectly linked through the Beta FamilySearch website. If this sounds confusing, it is, very confusing.