I work in both Qgis and ArcGIS. Most of my data has been created using ArcGIS and all of my data should be in the EPSG:2272. When I add my data to Qgis, it does not recognize my projection and gives it a user:100000 projection. Below is a comparison from the first part of projection files from ArcGIS and Qgis. As you can see the beginning section of each file is slightly different. Is this causing Qgis to not recognize my projection correctly? How can I fix it so my projections are recognized in both ArcGIS and Qgis?
from ArcGIS PROJCS["NAD_1983_StatePlane_Pennsylvania_South_FIPS_3702_Feet",GEOGCS["GCS_North_American_1983",DATUM["D_North_American_1983",SPHEROID["GRS_1980",6378137.0,298.257222101]],
from GIS PROJCS["NAD83_Pennsylvania_South_ftUS",GEOGCS["GCS_North_American_1983",DATUM["D_North_American_1983",SPHEROID["GRS_1980",6378137,298.257222101]],