Barcelona Flight School belongs to Aeroclub de Sabadell which is the 2nd biggest airclub in Europe with 30 planes ( twin, singles, aerobatics ,sailplanes) and it is a good and reliable school. The other school they talk about is EAS (European aviation school) it is said that has some relationship with the old Top Fly school ( managers? workers?) the only thing I know is that they fly Tecnam (single and twin). You have more schools in Barcelona like dreamflyers and aerolink. Consider that Barcelona is more expensive than other cities in Spain ( quite more expensive ) so try to calculate not only the price of the school but also the living expenses.
Good luck !