Cascada and Lady GaGa?

I wanted to get everybody's different opinions on this.But who do like better Lady GaGa or Cascada?Me I like them both personally I love Lady Gaga and Natalie Horler lead singer of Cascada.The reason why I ask this question is because here latley Cascada has been accused of riping off Lady GaGa's sound.Which Natalie has said is not true at all and I remember reading somewhere Lady GaGa said that she was a big fan of Cascada and said they were the ones that brought back dance music to America radio stations.So my question is who do you like Cascada or Lady GaGa and why?