According to Criterion website, the extras on this director's approved edition include:
High-definition digital transfers of Che: Part One and Che: Part Two, supervised and approved by director Steven Soderbergh, with DTS-HD Master Audio soundtrack on the Blu-ray edition
Audio commentaries on both films, featuring Jon Lee Anderson, author of Che Guevara: A Revolutionary Life
Making Che, a new documentary about the film’s production, featuring interviews with Soderbergh, producer Laura Bickford, actor-producer Benicio del Toro, and writers Peter Buchman and Ben van der Veen
New interviews with Cuban historians as well as participants in the 1958 Cuban Revolution and Che’s 1967 Bolivian campaign
Deleted scenes; Theatrical trailers; A booklet featuring an essay by critic Amy Taubin.
It's just a shame Criterion Blu-rays are still region encoded, unlike their DVDs which will play on my machine.