Complex sentence: Although these albums weren't as comercially successful as "Los Hermanos", they were acclaimed by critics and consolidated the band in the alternative scene, mainly because of their lyrics, considered clever by many, and their mixture of Brazilian rhythms with rock.
Split into simpler sentences: Although these albums weren't as comercially successful as "Los Hermanos", they were acclaimed by critics and consolidated the band in the alternative scene. Although those two albums did not sell as much as the first one, they consolidated the band as a cult band; mainly because of their lyrics, considered clever by many, and their mixture of Brazilian rhythms with rock.