Welcome Pickups transfer to PortMiamiorKiwitaxi transfer to PortMiami?

The short answer

For one traveler the Welcome Pickups transfer to PortMiami is cheaper by US$19. But at 4 travelers the Kiwitaxi transfer to PortMiami takes over, and at 5 travelers the Welcome Pickups transfer to PortMiami takes over, and at 7 travelers the Kiwitaxi transfer to PortMiami takes over, and at 8 travelers the Welcome Pickups transfer to PortMiami takes over.

The Welcome Pickups transfer to PortMiami is quicker: 15 min against 20 min.

Welcome Pickups transfer to PortMiami: Runs all night. Kiwitaxi transfer to PortMiami: hours not recorded.

Priced against each other

Whole-party totals · adult fares

What each costs for the whole party, in USD. The cheaper of the two is marked on every row. The Welcome Pickups transfer to PortMiami is charged in euros; its column is converted at the reference rate in its fare note. The Kiwitaxi transfer to PortMiami is charged in euros; its column is converted at the reference rate in its fare note.
Travelers	Welcome Pickups transfer to PortMiami	Kiwitaxi transfer to PortMiami	Difference
1	about US$69	about US$88	US$19
2	about US$69	about US$88	US$19
3	about US$69	about US$88	US$19
4	about US$138	about US$88	US$50
5	about US$138	about US$147	US$9
6	about US$138	about US$147	US$9
7	about US$207	about US$147	US$60
8	about US$207	about US$294	US$87

The cheaper option changes at 4 travelers, from the Welcome Pickups transfer to PortMiami to the Kiwitaxi transfer to PortMiami. The cheaper option changes at 5 travelers, from the Kiwitaxi transfer to PortMiami to the Welcome Pickups transfer to PortMiami. The cheaper option changes at 7 travelers, from the Welcome Pickups transfer to PortMiami to the Kiwitaxi transfer to PortMiami. The cheaper option changes at 8 travelers, from the Kiwitaxi transfer to PortMiami to the Welcome Pickups transfer to PortMiami. That is the whole reason this comparison is not a single number.