There are definitely texts that have both discussed within, but so far all my results of the two shows have been to just list them both as examples of cult shows or critically acclaimed shows that never got an Emmy.

http://www.worldcat.org/title/cult-telefantasy-series-a-critical-analysis-of-the-prisoner-twin-peaks-the-x-files-buffy-the-vampire-slayer-lost-heroes-doctor-who-and-star-trek/oclc/681482820&referer=brief_results

http://eprints.soton.ac.uk/28875/