Really does depend on what you are kitted out for, as in; Machinery, yard space available, labour, livestock and finally feeding methods. Really does depend firstly with space and yard layout, as in some people do and most people don't have space for a silgae clamp in their yards as they use up valuable space all year round. Whereas bales stacks can easily be made off the farm at little cost and are gone by March/April leaving at least 3/4 monthes of free space, which is more important in yards.
Secondly, machinery available does play a large part, as chopped silage requires a lot of seasonal kit. By this I mean machinery which only has a few monthes at the most use within the year, as in choppers, a number of purpose built trailers, tractors to pull them and addiquite staff to drive them which leads into my third point, as chopped silage requires a lot of staff all at once within the year. On the other hand to having short-use purpose built kit, farmers and contractors who use baled methods, a lot of their machinery will have two uses; As in Balers, trailers and some grabs which can also be used on the straw job.
Finally, feeding methods also plays a large part due to livestock and their requirements. By this I mean that different animals require different diets. Dairy cattle need a stable and balanced diet with high levels of energy a protein for high milk yields. Whereas Beef farmers feed food which allows cows to throw big and hungry calves, who's needs can me met in order for them to be fattened promptly and successfully.
Hope this makes some sort of sense and is of some use to you.