Idk why Interpol didn't put the Specialist as the closer for the initial release of Turn on the Bright Lights. It's such a better way to end the album than with Leif Erikson. They ended up adding it in for the 10 year anniversary edition but I feel like most people are just going to listen to the regular version of the album and not get the superior listening experience.
Both songs are pure art, but the outro on PDA makes it easily one of the best songs of all time, so beautiful