Don't worry, they're just doing their own things and will probably do their best work on their own. James will probably be poppy and arsty, and Josh will probably be experimental and chillwave. Their music will intersect with the elements you love from both of them and eventually they'll probably work together again. They're just hard to keep track of, so keep watching their careers and you'll get to know them further as artists.
RUIN is so fucking amazing. It's essentially synth pop, but has these absolutely pounding DnB beats that sound really 90s. At the same time, I definitely hear a post-punk influence, maybe even Gothic rock considering how reminiscent of Joy Division's Atmosphere it is.