AThe band is actually called Herman's Hermits, and did exist. They were one of the many British Invasion groups of the mid 60s. While the group is no longer together, frontman Peter Noone still tours and performs on a regular basis.
AThe versions are exactly the same, the only major differences being that the DVD combines 2 episodes to a disc, and includes a bonus disc. The contents of the bonus disc are as follows (taken from the WIkipedia page for the Anthology):Special Features - 1:22:46
Recollections June 1994 [16:51] - Paul, George and Ringo spend a happy summer's day together; singing, playing and warmly remembering early days of room sharing, haircuts, Beatleboots, first cars and meeting Elvis.
"Baby What You Want Me To Do" (Reed)
Raunchy (Justis-Manker)
"Thinking of Linking" (McCartney)
Blue Moon of Kentucky (Monroe)
Ain't She Sweet (Yellen-Ager)
Compiling The Anthology Albums [10:48] - Paul, George, Ringo and George Martin detail the process of how they choose the tracks for Anthology Albums 1, 2 and 3.
A Day in the Life (Take 1)
Back At Abbey Road May 1995 [14:51] - Returning to Studio 2, Paul, George, Ringo and George Martin reflect on recording at Abbey Road Studios in the Sixties and some of the inventive techniques used in creating these recordings.
Golden Slumbers (Take 1)
I'm Only Sleeping
Tomorrow Never Knows (Take 1 & Final Take)
Recording Free as a Bird And Real Love [10:57] - Paul, George, Ringo and Jeff Lynne reveal how they were able to produce the two new Beatles tracks from John's original demos provided by Yoko. This section includes intimate footage filmed in the studio during the recording of the tracks.
Free as a Bird (Lennon/Lennon-McCartney-Harrison-Starkey)
Real Love (Lennon)
Production Team [13:03] - Neil Aspinall, Derek Taylor, Geoff Wonfor, Chips Chipperfield and other key members of the Anthology production Team explain the process of how The Beatles Anthology series was created.
Making The Free as a Bird Video [11:12] - An intriguing insight into how the Grammy award winning video for Free as a Bird was made. Director Joe Pytka explains how he and Apple developed the concept and discusses the innovative techniques that were used in the production.
Free as a Bird (Lennon/Lennon-McCartney-Harrison-Starkey)
Real Love Video [4:07] - The video that was not featured in the Anthology series, now remixed in 5.1 Surround Sound.
Real Love (Lennon)
Credits (0:57)