Splitting and duplicating content - Best practice

Hi guys,

im working on a project at the moment that requires a dual-view mode in which the main content is basically doupled and the screen is split in half. ON the main screen, the user should be able to see product content from one item. If dual mode is selected , the layout of the main screen should basically be doubled (identical elements, different values) and a different product should be selectable for each half of the screen:


Splitpane seemed like the logical solution to start with, but its not really a the sort of thig where the right side displays the content as selected by the left sideā€¦ Would a split pane still be the way to go or would it make sense to somehow reference the main page as a child view in each half or something?

Any tips or ideas would be appreciated!