In general, I think Stormstress is better than GE in many situations since the 1 damage AOE can clear Protected and Ward. GE's plus side is that it basically stalls any horde of small creatures but I feel like most decks have a way to deal 6 damage easily either via buffs or spells, so the Armor often turns out to be moot. In that sense, Stormstress and GE have effectively the same stats. Your mileage may vary though!