We have two red flowering currants: one is a cultivar, and the other is the regular native species. The cultivar definitely blooms more profusely (and earlier). The cultivar is in the woodland garden, which has pretty nice soil, while the regular species is in the swamp: that could make a different, I guess. These pictures were mostly taken in March, with a few taken in early April.
Ribes sanguineum ‘King Edward VII’: