The difference between WWII subsims and modern subsims..?

[LoBlo]

As far as gameplay is concerned, what do you feel are the primary differences between a subsim of modern naval combat (Fast Attack, Dangerous Waters, etc) and an WWII subsim (SHIII, etc)? Does the gameplay and experience feel about the same with about the same player tasking? Are there any differences to the game "feel"?

The reason I ask is that I've always has played the modern subsim like DW and Fast Attack, not the old WWII subsim was curious to the gameplay differences. WWII sensors are less sensitive and weapons are dumber, so I've always expected that the game was probably less about detection, identification, and weapon evasion, and more about periscope peaks, and lining up for torp launches.

Are my assumptions correct?