Am I correct in thinking that, from looking at Helion's website, their design resembles the Lockheed Martin "bottle" design that popped up a few years ago?
It's pretty different. This is pulsed; LM's was going to be steady state. LM's design had magnets internal to the plasma which has significant difficulties.
The proposed fuels are different.
As far as I can tell LM's fusion project has stopped.