請問搭火車從Perth到Adeladie的票價問題? - 紐澳

請問從網路上訂GSR的票價，最後會出現


Ready rail $199

This is an Internet only fare. Ready Rail fares offer exceptional value when
you are looking to travel interstate with Great Southern Rail. These fares
are Non transferable and Non refundable. No changes permitted.

跟

Rail Saver (IP GHAN)

Rail Saver fares offer exceptional value when you are looking to travel
interstate with Great Southern Rail. These fares are Non Transferable and Non
Refundable. One change is permitted with an amendment fee payable.


請問這兩種的差別在哪邊呢?
我看不太懂Llooking to travel interstate的意思...

請問有人懂是甚麼意思嗎? 謝謝

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