It was well worth a second watch, and likely I will watch it one more time. I would be interested in what others might posit would be potentially the more compact machine, Polywell or LM's CFR (assuming DT for both). It would seem to me that the deciding design advantage metric would be MW/meter**2 exposure and limits of the cusp magnets. In that regard, it would seem LM's CFR with its central cusp magnet would reach a materials limit before Polywell as the CFR's central cusp magnet would seem to have closer proximity to the highest flux of reaction neutrons by being at the center of the machine's plasma. But maybe I am wrong.
The other parameter that may be just as important is shielding weight of one machine vs the other, and for that I am unsure which has the advantage (again I think Polywell, but it may be a six of one, half dozen of the other wash). Dunno.
And more difference is that the CFR is posited to not require external running plasma heating, whereas Polywell would likely need some steady state e-guns (not as great as the jump start guns for fast start plasma inflation, but there may be a workaround for jumping to cusp plugging beta = 1 condition other than gigantic e-guns).
Of course, compactness and gross weight are unimportant for utility power plants and even for ships (within reason). However for exotic applications such as air transports and space travel such details would seem to likely be deciding criteria.
Near term, cheap, dark horse fusion hits the air waves, GF - TED, LM - Announcement. The race is on.