Nique,
There is a book called 'A Short History of the Movies' by Gerald Mast which has a nice section of stills illustrating Eisenstein's and Pudovkin's cutting/montage techniques. Another book called 'Film: A montage of Theories' complied by Richard Dyer ManCann has a few papers by Soviet Filmmakers which I think would help.
I think Pudovkin approached montage as a poet, montage as metaphor..building a film through disparate images yet ones which harmonized as a whole. He would cut a piece of 'plastic material' in response to a person's emotive /physical state...water flowing from a jug as someone dies. Eisenstein saw montage as a 'collision of ideas' a real concrete interpretation. In the same scenario, he would cut to the actual horror. I know this is an oversimplification, but I think the 'sentimental' choices made in montage has much to do with the personality of the artist.