First thing first, as with Ural truck plastic material is much more friendly now (I am not sure for when change occurred but my last batch (T72 and BTR80) were from older more brittle and harder material. Now plastic is much easier to work with but its not too soft, and keeps great detail.
So for the model itself its delicate like all Zvezda models but have more defined and deeper details than previous German vehicles That is good thing, as detail on Stug were very delicate and shallow.. It could use some improvements (track links on the armour could be even more defined and lines on engine hatches could be bigger too) but its very nice model overall with much cast on detail. Overall I am positively surprised and i would rate it for this price as 5 stars model !
And lastly comparison with PSC great PzIV model. To be honest I prefer PSC, but its more than twice the cost of Zvezda. So I will bulk my planned 1942 and Desert campaigns with Zvezda models. Apart from minor differences they are great match - if you fancy it shurzen from PSC will fit on Zvezda models (but turret shurzen needs some work). And they will look great side by side. Mainly difference is broader and little more flat turret- but that is indistinguishable on the table.
Overall its one of the more useful Zvezda WWII models - They are cheap option for bulking up, but the difference is normal visible (shallow detail, disappearing lines and lack of bolts on the side surfaces)
But that is not the case with Pz IV F2.
Only WWII multiples I have are T34 (that has to be converted for the type I like but one need them in 10s generally :) and Opel Blitz, but PZIVF2 will be third one.
And I await Tiger I that is meant for this year (with Sherman tanks) - AT last useful vehicle that will work without conversions.. PZIVF2 give me good hopes for quality.