Groupe Gorge SA (EU:GOE) (GGRGF)

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I understand that GGRGF was the result of immediate demand in dollars in the form of foreign shares on the U.S. OTC market, and the new ADR is sponsored by BONY as a Lvl 1 asset, I get all that, but again, what exactly does that translate to with regards to the difference of the two? Trading volume of one versus the other?, Is FX risk adjusted for one but not the other? Is institutional ownership greater on the ADR I assume than the other?

Again I'm unsure as to what the actual differences are and if one should be selling their existing shares to purchase the new.