Could you link some photos to this topic?

I am so glad that someone asked "what is the difference in the dragon smart kits" question. I just finished building Cyber Hobby Orange box Panther II KIT # 9103. What a piece of garbage!!! The road wheel-suspension fit was horrible! I expect a little tweeking here and there with any kit but this was totally a mess. If an inexperienced modeller got ahold of this kit and tried to put it together following the instructions to the letter, the model would have ended up smashed and the person would end up discouraged.
To make matters worse, I tried to get some "Customer Service" out of Dragon U.S.A. and although they were very polite, there idea of " PROBLEM RESOLUTION" left quite a bit to be desired. It was explained to me in so many words that I should not have expected so much out of an "Orange Box" kit. What I expected was "no frills" what I got was poor design and 0 support.
I know Dragon usually makes a top notch product but I would steer clear of this kit and Orange Box kits by CH all together.

Well...

C-H has certes proven that they have an eye for the ugly! It's interesting, in the "about anything went" way of later-war German creations. I think it likely to have been more a "flak" notion than some version of an AT mount- no crew shelter whatsoever, but also no apparent restriction on moving that gun around in traverse. I would have to guess that crew survivorship would have been, well, really poor and short were this thing to have arrived near where the other folks were charging in!

Couple of comments on....

Those C-H "orange box kits"- Jon has it right, IMHO. OLD stuff re-packaged with a few newer bits. If the original kit, as in that Panther II, was junk, the orange-box version remains so. I regard most of these as things to stear clear of. (But- if you want to build a StuG III F or E, the orange boxes do offer a solid basis for building from- as also for the Brummbar late.)

Those pics of that 88 on the Pz IV hull...

Couple of things, here.

1) Somehow the 3 B&W pics offer a little tease and confusion- one shows a "right-front corner" with a track- another shows a "right-rear corner" without a right-side track. Huh. Another shows both tracks on... Maybe there were 2? Maybe someone pulled a track off between takes? Maybe either the rear or the front corner pic got reversed (I sorta favour that for the rear, as I think there might be a smashed muffler bit on the "left" of the rear shot- but that's only a guess)- and, in any case, the right corner does not reconcile to the both-tracks-on pic.

2) That model makes about no sense. It's way hard to believe that the Germans would have cut the hull-sides off the crew compartment- and then re-attached the hatch deck! And without any vision devices, to boot. Maybe they were thought by the modeller to be making a real "chopped and lowered" panzer! LoL!

I would be more willing to accept that the crew area was simply left open- sort of like that Pz 1a "ohne aufbau" driver's training vehicle. Or like the RSO-3 version with that PaK 40 mount. Anyway, that could explain the apparent lack of any raised hull structure aft of the glacis... If it were what it seems to have been- a field-shop conversion- leaving the crew seats open would be quite likely... the shop COULD lift off the entire front upper hull, attach a base plate on the "fender-line" level (lowering the C of G a little for what would have been a seriously unstable mount), and keep things sorta simple. Having hatches at that level would leave zero head room and serve only to keep rain out when parked, I think.

3) That 88 and the "turret ring"...

We can get no good info from those B&W pics on this- I would agree with the position that the Pz IV TR would not handle an 88-sized turret. But I would be ready to accept that the gun was mounted in a pedestle mount on a base-plate (OK- perhaps like shown in that model?). That would be reasonable given its apparent height above the hull-mid top.

No expert answers here, gents- just my opinions for what little...

The different is that the conv. kit shows no upper driver housing and the dragon one did. The two photos I know showed no housing.