I'd say the other way round, though it's too early, it seems they have closed the technological gap to Mercedes and now the cars are near in terms of performance.The tables are turning. Ferrari has found som thecnological advantage that they are hiding behind that car, just like the blown diffuser advantage that Redbull(or was it Brown?) had in the past.
Today was a particular case: because of the colder temperatures Mercedes struggled in search of grip with ultrasoft, but I don't think there will be this gap in race.