If your going by hits then oasis are by far the more successful band, they sold more records, have more fans made more money.
Though Blur are easily a better band musically, from there humble beginnings as a Britpop band with albums like Leisure and Modern life is rubbish they have mixed electro-pop, grunge and alt rock, becoming one of the worlds most inventive bands.
Blur had and have more of an original sound whilst Oasis are a popier version of The Stone Roses, and utter products of the Manchester Britrock scene.
Also Blurs albums Leisure, Park life, 13 and Think Tank all albums were huge hits. Oasis really only had what’s the story morning glory as far as albums go.
So I say Blur 100%
