I don't know from an abstractors point of view but as an former co-op owner, the co-op gives you a percent ownership in the building and a propiertary lease in the specific unit.  A condo gives specific ownership in the unit.

In NY the co-op has UCC filings to record the ownership while a condo has a traditional deed recorded.

I do know from my mortgage experience that number of banks doing co-op loans is more limited than condos and refinancings are difficult to get.