Most of it seems to be pricing things more cheaply for tourists than for residents (Interail is not available in the EU country you are resident in.) And Eurail

Most of it seems to be pricing things more cheaply for tourists than for residents (Interail is not available in the EU country you are resident in.) And Eurail seems to be even cheaper than Interail: Interail 7 days within one month adult 2nd class €352 Eurail 7 days within one month adult 2nd class $282 (€265) I considered buying an Eurail ticket last time I went back to Britain though for my trips it made little difference to the total cost after factoring in the supplements for intercity trains as I was travelling off peak anyway.