Aquilani vs. Alonso: Is John Arne Riise right?

According to John Arne Riise, new Liverpool signing Alberto Aquilani carries a greater goal threat than the recently departed Xabi Alonso. Whilst that would clearly be fantastic for the team, is it actually true?

In an interview, Riise stated:

"He's [Aquilani] is really good on the ball, with good passing, good movement, he works hard and is a good professional".