Moon Druid I can certainly see an argument for, but Wizard? Not so much. They're great, don't get me wrong, but they're also ridiculously fragile compared to the other casting classes and lack healing utility. But on top of that, their most glaring weakness is their "single-resource dependency".
Wizards rely on spells for defense, offense, and utility—both in and out of combat, and they're also much more reliant on their higher level spell slots than Clerics or Druids or even Bards.
However, I also Paladin vs. Moon Druid is a far more apt comparison than Paladin vs. Wizard, because the former are both "Support Bruisers/Tanks", while the latter only have Spellcasting in common (using the loosest definition of "in common").