The HurrIID is a pathetic anti-tank plane. Maybe in real life against the earlier lesser armed tanks those low-velocity 40mm guns could do something, but they pale in comparison to the Soviet 37mms on the IL2 and the 37mms on the Ju87.
I've come down in a perfect attack angle before, nearly 80-90 degrees, fired 2 bursts, seen 4 hit sprites in close proximity on the rear deck of a panzer before, and got nothing. I flew several sorties in a row once defending a base from a major GV attack. I unloaded 3-4 sorties' worth of rounds into a handful of tanks (same target over and over) and in one case I unloaded 30 rounds into a single panzer with nothing to show for it (and I was hitting, I did get the kill while I was landing and some GVer killed the guy for me, he wasn't smoking or damaged at that point though so it was not my doing).
Now, if you were to say "We have the IL2 with 37mm, so we don't need the Ju87" you might have a bit of an argument, but the Hurr2D is rubbish. Pure rubbish.
That said, there are differences between our IL2 and the Ju87. The Ju would have higher penetration I believe based on the round fired. It would also handle much more differently than the IL2. IMO the Ju is more docile in handling, lighter on its wings, and would probably be able to make an attack and pull up with less risk of crashing than my usual IL2 sortie.
Let's not forget historic matchups... For historical immersion we should eventually get it for the same reason we should get the Ju-52.