A few things you haven't considered before posting.
1. Steve Smith had better players at his disposal in tests. Warner and Khawaja for the most part and then Labuschagne and Head. These guys are better test batters than what Misbah had baring Younis Khan - unless you're trying to argue that Azhar Ali > Warner.
Even guys that were in and out of the team such as: Voges, Chris Rogers, Bancroft, were better test batters than majority of Pak XIs that Misbah fielded.
Let's not even get started on the bowling resources. Starc + Hazlewood + Lyon that's literally 3 ATG level bowlers. And then consider fielding as a factor. Anyone that Australia selects is twice the fielder of the Pakistani equivalent in that playing position.
2. Like Smith, Misbah also upped his game as captain. He averages 51 as captain vs 33 as non captain. That's a big difference.
And at the age he did it at... only deserves respect. He was 36 when he took over as captain, Smith hasn't hit that yet. Let's see if Smith can average 50+ in the years after turning 36.
Anyways my last comment on this as the thread isn't about Misbah yet your boy
@topspin brought him into discussion just like you guys do in every other thread.