通常のほうが良いと思うのですが

HK$220 for ONE Airport Express Single Journey and the additional
benefits listed below.
HK$300 for TWO Airport Express Single Journeys and the
additional benefits listed below. The free journey(s) is valid
for 180 days from the date of purchase.

The additional benefits, which apply to both types of Tourist
Octopus, are:
Three days of unlimited rides on the MTR* (except on the Airport
Express Line), starting on the day of your first MTR journey.
HK$20 Octopus stored value, which can be used on the MTR after
the three-day unlimited ride period. It can also be used at any
Octopus retail outlets or other transport systems accepting
Octopus.

MTRは海底を走ると10港元で、陸地の近場で5元程度です。