Spawning into different point clouds is [supposed to be] easy to set up and allows you to use different shaders on different clouds, which gives you more control over the look of your particles.
Spawn on Collision, however, doesn’t seem to work with a different point cloud. As soon as you change Self to a different point cloud, everything goes red and there’s all kinds of errors and warnings. Look at the Show Messages for Spawn on Collision:
It’s like that all the way back to 7.01. If there’s a way to do it right, I don’t know it yet.
To spawn particles into a new point cloud, try using Spawn on Trigger instead.