By whatever name it goes, when all said and done it is a helium balloon by any other name. That which keeps it aloft is helium and the curious thing about helium is we are told we are running out of it. Here is a link to the bit about running out of it:
https://www.quora.com/Are-we-really-...-out-of-helium
Do these chaps at Hybrid know something that these other folk, who fear we are running out of the stuff, don`t know about so that they can blow their balloon up with 1.34 m cu.ft. of some kind of stuff to get it off the ground.