Tigers on the Hunt (TotH) is a good game. I think it's the computer game more like Advanced Squad Leader (ASL), the most famous board game on tactics of World War II (Avalon Hill; Multi-Man Publishing). The first ASL module was published by Avalon Hill in 1977 .....
However, Heroes of Stalingrad (HoS) is a game superior to TotH. At least that's what I think. Naturally, the graphic environment is much better, and the quality of the graphics is not comparable between both games. But also the Artificial Intenligencia is superior and the tactical level provides many more variants.
For those of us who have played ASL we will see that the game system is not the same but, with due respect to those who do not see it in this way, I think that the HoS game system is more "friendly" than the classic of ASL (and that also uses TotH).
Another consideration is that TotH ignores the existence of walls, hedges, multilevel buildings, and many other elements that, over the years and many modules published, ASL was enriching to become that wonderful game that many have enjoyed and that we are still enjoying with the new modules that continue publishing (more than 40 years later).
By the way, the game is not difficult, you just have to practice more with it. If you have not played ASL it may be will be surprising to you but, at the same time, it is a challenge for a formidable Squad Leader like you.
Also, the historical module "Barrikady", from "Heroes and Leaders mod", was developed in the theater of "Stalingrad's wonderful wintry environs".
Good luck soldier !!!!!