Honest question: aside from Lee being a better goalscorer on the powerplay (which believe me, ain't nothin'), what makes he and Zucker "not close?"
They are definitely close, but he's basically ignoring any context and team dynamics, which have pretty significantly favored Lee.
A short list of some context:
Lee plays with Tavaras in offensive situations (Bailey, Tavaras, Lee line got most O zone starts on Isles), Zucker mostly stapled to Granlund/Koivu in a shut down role (least O zone starts on Wild).
Lee's competition for ice time has been Andrew Ladds corpse, while Zucker is competing with Parise, Nino, Granlund.
That competition has led to Zucker getting 240 minutes less PP time than Lee.
At 5v5 over the last two years
Zucker
161 GP
39 Goals
82 Points
2.21 P/60
1.81 p1/60 (primary points)
42% Ozone starts
2.51 Rel CF%
59.01 xGF%(heavily influenced by Koivu/Granlund who are redic defensively)
62.37 GF% (heavily influenced by Koivu/Granlund who are redic defensively)
Lee
163GP
47 Goals
73 Points
2.03P/60
1.75 p1/60 (primary points)
53% O zone Start
3.3 Rel CF%
50.93 xGF%(heavily influenced by Koivu/Granlund who are redic defensively)
50.46 GF% (heavily influenced by Koivu/Granlund who are redic defensively)
TL/DR
They are both really good, different style plays. But the biggest difference in production is usage, and they are definitely in the same realm.