Can someone help me out choosing between the Historic Scotland pass vs the Explorer Pass - I'm seriously baffled because the math doesn't make sense. Here are the two sites/passes with associated prices that I'm referring to: https://members.historic-scotland.gov.uk/benefits and https://www.historicenvironment.scot/visit-a-place/travel-trade/explorer-pass/
The latter costs £35.00 for 7 days and the former costs £52.20 for a year. Unless I'm completely missing something both seem to offer free admission to the same places, eg Sterling and Edinburgh Castles, sights on Orkney, Iona Abbey, etc, etc. We're in Scotland for almost 3 weeks so if they have the same validity the latter is a no-brainer. Do I have to be a UK citizen to get the Historic Scotland pass? What am is missing?