I don't agree with your assesment that "HoS went for realism", because there are two sides to that coin when talking gameplay design, how it looks and presents itself, and how it actually works and interacts with the rest of the gameworld, and TWI has only succeeded with the first one (for the most part), HoS has many realistic looking features that you'd think would make for a super realistic game, but they don't, because they haven't succeeded at the second part, duplicating real world results.
HoS realism is only skin deep, it's all "features" that we could list, and it would look very impressive on a bullet-point list, but it doesen't play realistic, it plays like.. an FPS game, any generic WWII themed FPS game, just with shorter life expectancies, all thouse features never come togeather to form realistic and tactical play, hell it doesen't even form something i find unique, it just feels so very bland and mediocre to me.