Is there a common id between the datasets? If so I would try the ChangeDetector.

If not, then I would try something along the lines of using the County Assessor as the filters in a spatial filter (intersects) and keep only the Failed parcels from the surveyed along with the complete assessor dataset.

I managed to get something to work using the FeatureMerger Transformer instead. It works as follows:

• First Delete Marshall and Wetzel County Parcels from Target Dataset
• AttributeCreator and AttributeKeeper Transformers to Adjust and Narrow Down Columns (for example, reformat a Wetzel County Parcel APN to be something like WV-103-1-1-1, but Marshall County to be like WV-51-1-1-1)
• Use EsriReprojector - Sources were USA Contiguous Alberts Equal Area Conic or NAD 1983 UTM Zone 17N US FT, Destination is GCS North American 1983
• FeatureMerger Transformer with a Join On matching unique parcel identifiers (GIS_ID in Requestor, GIS_LINK in Supplier)
  • UnmergedRequestors were untouched by FeatureMerger, and skipped EsriReprojector at the next step since they had already been reprojected
  • Merged, UnusedSupplier, and <Rejected> all took attribution and/or new shapes from the surveyed tracts, and went through EsriReprojector (since they hadn't been reprojected yet)