The top 2 teams in the EPL are much richer than the rest of the league, hugely so. There was once an argument for Chelsea but they have put the brakes on hard.
In the last 10 years the PL has had City, United, Chelsea and Leicester, La Liga has had Barca, Real and Atletico.
So 4 different winners of the PL (one a total once off) and 3 in La Liga. There is nothing to suggest any of the top 6 can win it. The arrival of Pep and Jose only maybe rams this home more.
In the last 10 years England has had 6 different FA Cup winners, Spain have had 5 different CDR winners (Barca, RM, AM, Sevilla and Valencia)
In the last 10 years, 7 different teams have made up Englands top 4 (CL positions)
City, Chelsea, Spurs, Liverpool, Man United, Leicester, Arsenal
During the same period in Spain have had 9 different teams in the top 4 (CL positions)
Barca, Real, Atletico, Sevilla, Villarreal, Valencia, Bilbao, Sociedad, Malaga,
Yes Spains top 2 are more dominant because they are 2 of the best sides of all time with Atletico sandwiched in between at times but there is no way the PL can claim to be more competitive.