You want it to be one way, but its the other.
I'm just using the Premier League time span, since that has been the beginning of big TV money flooding in and 25 years seems like a long enough time span.
Spain has 10 UCL winners (Real 6, Barca 4) and 5 UCL runners up (Atletico 2, Valencia 2, Barca 1). England has 4 winners (Man U 2, Chelsea 1, Liverpool 1) and 5 runners up ( Arsenal 1, Chelsea 1, Liverpool 1, Man U 2). Four teams for each league have played for the UCL. If Griezmann doesn't miss the penalty two years ago, the number of teams to have won probably would be equal.
If you assume the Europa League is comparable to a top bowl game not in the playoffs, for the same time frame
Spain -
Winners
Sevilla (5), Atletico (2), Valencia 1
Runners Up (3)
Atletic Bilbao, Espanyol and Alaves
England
Winners (3)
Liverpool - 1, Chelsea - 1, Man U - 1
Runners Up (4)
Arsenal 1, Middlesborough 1, Liverpool 1, Fulham 1
If we eliminate those from the UCL list to prevent double dipping, Spain has 4 top Europa League level squads and the EPL has 2 (both of which currently no longer play in the top tier).