Yes I have read the Envia article before now. Too bad I can't invest in Envia yet. This may be why EESTOR finally agreed to release some information on their technological developments "Before Summer". As for who has the better solution to the energy storage problem, that will depend on cost, service life, toxicity, and a whole lot of other factors.
Most of all, it depends on who gets to market first.
If EESTOR's release of information is, in fact, the "Reveal" we have all been waiting years for, they win! If not,,??????
we wait more years.