I think you are correct. They are the same.
http://www.fs.fed.us/visit/passes-permi ... ees-passes
Cost $80 Annually
Who Qualifies Anyone can purchase an Interagency Annual Pass.
Benefits
Honored nationwide at all Forest Service, National Park Service, Bureau of Land Management, Bureau of Reclamation, and US Fish & Wildlife Service sites charging entrance or standard amenity fees.
Valid for 12 months from the month of purchase. Expires the last day of the month punched.
Has two signature lines and any two individuals may sign the pass. Both are considered pass holders.
Admits pass holder and any accompanying passengers in a private non-commercial vehicle.
At per-person fee sites, admits pass holder and up to 3 persons. Persons 15 and younger are admitted free of charge.
Frequent visitors of multiple federal agency lands may save money by buying an Interagency Annual Pass.
Receives a 50% discount on some expanded amenity fees like campgrounds (does not include hookups for water/sewer/electricity), highly developed boat launches and swimming sites and for specialized interpretive services.
Validation The date is validated by the seller at the time of purchase, unless it is being purchased for another as a gift. The pass is not valid for use until at least one person signs the pass.
Display
At staffed sites, show your pass to the booth attendant.
At unstaffed sites, use hangtag to display pass from rear-view mirror. Hangtags are available wherever you purchase a pass.
At per-person sites, present pass upon request.
Other Important Details
Nontransferable.
Once signed, the pass may not be given to or used by anyone whose name is not on the pass.
Concessionaires may or may not honor his pass, according to the terms of their current permit.
Decals may be issued free for open topped vehicles at unstaffed sites Decals are only valid when the owner has an accompanying valid pass.
Does not cover expanded amenity fees or special recreation permits.
How to Obtain a Pass and Hangtag
Online at
http://store.usgs.gov (link is external) or at most national forest or grassland offices.