Does anyone have any ideas on why these two itineraries are priced very differently by the online RTW tool? Tested both of these just now:

• USD 3778 ($2991 base + $787) - LONE5 - Routing: Johannesburg - Sao Paulo - Buenos Aires - Santiago - Easter Island - Tahiti - Auckland - Sydney - Shanghai - Hong Kong - Delhi - Tokyo - Bangkok - Amman - Vienna - London - Mauritius
• USD 2784 ($2038 base + $746) - LONE5 - Routing: Johannesburg - Sao Paulo - Santiago - Easter Island - Santiago - Buenos Aires - Dallas/Ft. Worth - Beijing - Hong Kong - Delhi - Tokyo - Bangkok - Amman - Istanbul - London - Mauritius

Both start on JJ8163 from JNB to SAO and touch 5 continents. Shouldn't the base fare be the same? Thank you for any insight! 🙌