My solution was to not pull any punches: I very clearly split the screen down the middle. The complementary colors (orange and blue) are opposite each other on the color wheel, so they clearly mark their own territory, yet they’re not fully saturated, so they coexist in a comfortable way.
I minimized the amount of information on this page – just a few words on each color field, along with a sample of my work – so that it’s easy to understand. There is a link on each side, which takes the viewer to their desired “track”. Once on that track, clear navigation makes clear how to switch between portfolios, as desired, for a solid user experience.