55154635_ual_Globe____ArcGIS_Comparison__ArcGIS_KML_Layer_Functionality
[KML Feature] Interactive editing of KML content
Google Earth has functionality for creating and editing KML content through interactive placement of KML elements on to the surface of the globe. ArcGIS does not support functions to interactively create or edit KML content.
USGS InfoBank Virtual Globe -- ArcGIS Comparison
ArcGIS KML Layer Functionality