Jennifer, I wouldn't do either pass. The Paris Pass is ridiculously overpriced, and the Passlib' is just slightly better.
The Paris MUSEUM Pass, on the other hand, is a very good buy if you want to see - and have time to see - enough of what it covers. A 6-day adult pass is 74€, covers most of the city's major attractions, and you can go back to any of them as many times as you wish to: a bonus when tackling the mighty Louvre.
It does not cover the Eiffel or transport but we did just fine getting around central Paris with one or two carnets of 10-ride t+ tickets for 14.90 € apiece (and a lot of fun walking!) It also doesn't cover a sightseeing bus tour (we had no interest in) or a 1-hour boat cruise, which you can easily do on your own for €15.
https://www.ratp.fr/en/titres-et-tarifs/t-tickets
A 5-day Passlib’ includes a 4-day museum pass+ 5 days of transport (Zones 1-3) + a 1-hour boat cruise and 1-day sightseeing bus tour for 155 €. The Eiffel is an add-on for an additional 15€.
A 6-day Paris Pass is €239.00. Includes 6 days of transport (zones 1-3), a 6-day Paris Museum Pass, the boat cruise, sightseeing bus tour and some other odds and ends. It does not cover the Eiffel.
The transport coverage of the above passes do not apply to getting to or from the airports.