How to display comparison of 2 products with similarities

I am in the following situation.

Requirements:

A web-based functional configuration-tool for 2 of our systems shall be created, whereas the financial advantage of System A over System B should be shown alongside with the built-in components (so as kinda table).
The user (mostly internal sales people) selects the appropiate configuration (radio buttons, text boxes, nothing special), and the built-in components should be shown depending on those configurations.

The problem:

Layout-Space:
Since the comparison should be in focus of the user, I cannot simply place 2 tables showing the components and their costs among themselves, since the user would have to scroll down for System B and cannot directly see the price advantage in detail.

Info: The 2 systems consist of ~ 6 components, whereas they share 3 of them.

I just graduated from grammar school and make an internship, please have indulgence.