求教Swiss Pass和购买意大利-瑞士火车票问题

我在国内已经买好了Swiss Pass，先到意大利，然后从威尼斯到Brig转Zermatt。

在意铁网站购国际票时，发现在“Select your fare”里有多种选项，貌似“GA Switzerland”对Swiss Pass持有者有优惠。但查看其条款又产生了疑问：

GA Switzerland

Fare available only for the Italy-Switzerland services that can be bought by holders of the Swiss general discount ticket, Swiss Pass, Swiss Flexi Pass, Swiss Card, Swiss Transfer ticket or the Arcobaleno travelcard, limited to the Italy-Ticino Canton services or return.


GA Switzerland 2

Fare available only for the Italy-Switzerland services, available for purchase by the holders of Swiss general discount ticket, Swiss Pass, Swiss Flexi Pass, Swiss Card, Swiss Transfer ticket or the Arcobaleno travelcard, limited to the Italy-Ticino Canton services or return. Available for purchase also by the holders of Railplus Card, Carta Verde or Carta Argento.



1. 这两种票是不是只能买到瑞士Ticino Canton地区？而我去的Brig能适用吗？

2. 如果去Brig不能适用，为什么买去Brig的票，照样可以选这种票呢？

3. 对于SP持有者，这两种好像没区别，但折扣却不一样。

4. 如果可以买，那么SP是否需要先开通呢？


问题比较多，敬请指导！