Instruct: Classify Amazon reviews into positive or negative sentiment
Query: ABBA Gold vs Mamma Mia

After seeing Mamma Mia in Las Vegas I purchased the ABBA Mamma Mia CD. Then I thought I would like to have the original songs and ordered the ABBA-Gold Greatest Hits. I enjoy it a lot; but I prefer the Mamma Mia CD which takes me back to the fun night of actually being in Las Vegas and seeing the musical.