Throwing in my contradictory opinion: The 4 different ILSes I worked with in circulation and reference prior to coming to an Evergreen library all had markedly different staff and patron catalog interfaces and I never found it to be a problem -- but that is also what I was used to. When walking a patron through a search either in person or on the phone, I would use the public interface to demonstrate. When working with other circ staff in earlier versions of Evergreen I found they often found it *more* confusing to have the same interface where they could see more information than the patron because they wouldn't always realize the patron couldn't see everything they were seeing.
More specific to current Evergreen, the Angular staff catalog is significantly faster both in returning search results and especially in displaying record details. I'm not sure of all of the factors that influence that, but not needing to load added content from a third party site is certainly beneficial.
Throwing in my contradictory opinion: The 4 different ILSes I worked with in circulation and reference prior to coming to an Evergreen library all had markedly different staff and patron catalog interfaces and I never found it to be a problem -- but that is also what I was used to. When walking a patron through a search either in person or on the phone, I would use the public interface to demonstrate. When working with other circ staff in earlier versions of Evergreen I found they often found it *more* confusing to have the same interface where they could see more information than the patron because they wouldn't always realize the patron couldn't see everything they were seeing.
More specific to current Evergreen, the Angular staff catalog is significantly faster both in returning search results and especially in displaying record details. I'm not sure of all of the factors that influence that, but not needing to load added content from a third party site is certainly beneficial.