Teuvo has a track record that neither player has.
And you are not getting either O'Connor or Robertson on the top PP. Teuvo had 9 PP goals whereas the only player with more on the Pens was Crosby. That's even including Guentzel. Teuvo was 3rd on his team behind Jarvis/Aho.
I'm in the realm Teuvo has the experience over either of those guys. And Robertson is a total ????, his size totally makes the teams top six softer. O'Connor is still finding out who/what he is.
I'm looking for the experience over rookie like players.
Teravainen wouldn't even be on the Penguins top PP unit, so I don't see what kind of relevance this has.
Teravainen has consistently not been a good 5v5 producer with Carolina in the past 3 years:
2023-2024: 25 5v5 points in 76 games
2022-2023: 20 5v5 points in 68 games
2021-2022: 23 5v5 points in 77 games
He's not putting up 31 PP points on the Penguins like he has been doing with the Canes, because he wouldn't get that kind of usage. He's a powerplay specialist that wouldn't be used on the powerplay, going with Robertson or O'Connor on Crosby's line would make far more sense.
He's in the same mold as Granlund and Kessel, in that he's an awful 5v5 player that just relies on huge minutes on the powerplay to get points. Frankly, the Granlund comparison seems especially accurate.