The Mike Nichols 1970 adaptation is a masterpiece in virtually every way. Amazing cinematography, innovative de-constructed screenplay, absolutely perfect casting, and most importantly genuinely conveys the dark insanity of the war as Heller's novel portrays, the absurdity of the military, and the banality of evil. Spectacular in every respect.
Despite being 6 hours rather than 2, this really adds nothing, while falling short of the original film's concise storytelling. It's very pedestrian and TV movie in its approach looks more like an Abercrombie & Fitch commercial than a serious film. Interchangeable pretty boys that fail to differentiate themselves as characters.
It's competent and very watchable, but to me it falls well short of the film to an almost embarrassing degree. Not quite as bad a comparison as the TV version of "The Shining" to the Kubrick film, but damn close...