… in the big-picture of things, though, these two animation systems are “apples vs. oranges” in their fundamental approach to the task. They simply deal with the problem of “rendering things” in a very different way.
Here is where Blender’s “library linking” capabilities can help you a lot. Set up various files of “assets,” particularly the meshes and their locations in 3D space. Put your camera-objects in there, too, so that you can guarantee that the various shots will be taken from the same points-of-view and lens settings. This allows you to link-to what is common between the various files. But then, from that point forward, set up individual .blend files that each contain what is uniquely different about “this approach” versus “that one.” If you do this very carefully, the two can be combined for a synergistic effect in the compositor. (It’s a three-step process: "BI renders, “Cycles renders,” “Composite the files thus-made.”)