I read an interview with a Sturmgeschutz crewman, he liked the late models III better than the IV. It was almost the same thing, but the IV was slower, and that mattered.
I'm tracking a guy in England that found the stripped, rusted, shot-out hulk of a Stg. III in the UK, and is completely reconditioning it. The transformation is stunning.
Stug III was the poor man’s panzer. Extremely effective though.
Does he have a website? That is a totally cool project!
The Finns thought the same, and far preferred the STUGIII to the later StugIV. They also had the interesting variation of usually removing the belt-fed German MG34 and MG42 machineguns from their STUGs and replacing them with drum magazine-fed captured Russian DT machineguns. This may be because the 7,62x54 Russian ammo was both plentiful and available for free from dead Russians, or could have been because the lubricating oil used on the finely-machined MG34 was not very compatible with the cold weather of war on and near the Arctic Circle, and the MG42 just went through belts and barrels too jolly fast.