"It's strange to find two very different, but almost equally perfect versions of the same song, but if anyone's done it, Yo La Tengo has.
Yo La Tengo - "Blue Line Swinger"
In the Original version, from Electr-o-pura, "Blue Line Swinger" is a sprawling 9+ minute epic that grows gradually until the cymbals and guitars crash like building ocean waves. By the time you reach the sweetly reverbed "ba ba ba ba"s at the song's conclusion, they're the candy-coated life preservers in an ocean of sound. (In fact, few do "ba ba ba"s as well as YTL - especially on this record - and, here, they're freaking perfect.)
Yo La Tengo - "(thin) Blue Line Swinger"
In the "thin" version, from the Camp Yo La Tengo EP, the song has been edited and remixed down to a roughly four-minute version. While one could argue that the song has definitely been reined in, it somehow segues together key parts of the original, but in new ways. This is most notable in the intro, which strips the instrumentation to the acoustic guitar largely buried in the chaos of the original, building up musically from that instead of the multi-minute intro jam that originally birthed it.
It always amazes me that YTL were able to craft a new song out of their own work - as opposed to a third party remixer finding the different pieces for themselves.
It's a great song either way, so it just depends on which version you're in the mood for."