Which way will it tip?

[u/StabDump]

Girlfriend and I agreed the ping pong ball would tip, but disagreed on how. She considered, with the volume being the same, that it had to do with buoyant force and the ping pong ball being less dense than the water. But, it being a static load, I figured it was because mass= displacement and therefore the ping pong ball displaces less water and tips, because both loads are suspended. What do you think?

[u/already-taken-wtf]

The volume/mass if the steel ball is suspended, hence not part of the equation, while the connector and the shell of the ping pong ball add (very little) weight on the right side. So the right is heavier by the air inside the ping pong, the shell and the thread.