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I guess it might depend a bit on what are the most important features of each product. Are the differences most important or the generic (but important) features across all products more important? If the first then separate pages makes sense, if the second then maybe consolidating onto one page makes more sense. You could also try giving a full feature rundown on your most important/visible product page and then give a shortened version on the other two referencing the first one with a "for a complete rundown of all features" type link.