On Thomist premises the division held even before the fall
Thesis XXX. Indeed, on these doctors' assumptions, the division of divine grace into sufficient and efficacious must have applied even to unfallen nature. On their teaching, for any creature to act it is not enough to have the power of acting granted by the Creator; the first cause must also apply that power to acting and move it beforehand.
So for the unfallen creature actually to do good it needed not only an aid that gave it the strength to do good but also another by which God would effectively move and predetermine its faculties to do good. It follows that the apostate angels did have sufficient aid for persevering but lacked the efficacious aid required for actually persevering, while the good angels were given aid for persevering that was not only sufficient but efficacious of itself.
Latin
XXX. Quin ista gratiae divinae partitio in sufficientem atque efficacem, secundum Doctorum istorum hypotheses, locum habere debuit in natura etiam integra. Etenim, ex illorum doctrina, ut creatura quaevis agat, non satis est ut habeat agendi potentiam a creatore concessam, sed praeterea necesse est ut causa prima illam ad agendum applicet atque praemoveat. Ac proinde ut creatura integra reipsa bene ageret, non solum opus habuit auxilio, quo darentur ipsi bene agendi vires; sed praeterea alio, quo Deus facultates ejus ad bene agendum efficaciter moveret ac praedeterminaret. Unde sequitur Angelos Apostatas habuisse quidem auxilium sufficiens ad perseverandum, sed ipsis defuisse auxilium efficax necessarium ut actu perseverarent: bonis autem Angelis datum esse auxilium ad perseverandum, non tantum sufficiens, sed etiam per se efficax.