I don't think this is quite the same thing - I cannot see anything on your webpage that suggests active altitude control and autonomous planning strategies to allow any form of controllable navigation, like Belal asked about.
What you made is a sort of deconstructed super-pressure balloon or inverted ballonet that found an equilibrium altitude passively. Complete circumnavigations of the earth have been achieved several times by amateurs with these passive methods, but it is not the same thing as what Loon was trying to achieve, where a balloon could intentionally vary its altitude to catch a specific wind in order to fly somewhere, station keep, or whatever. I'm not even sure that Loon ever achieved arbitrarily positioning ability, but I think they managed to at least keep the 'constellation' well-spaced and distributed with active techniques.
If Dan Bowen still monitors this list he may be able to chip in.