The primary "better" qualities of the 2012 edition stem from the shift from artificial to live instrumentation:
Here’s a concise promotional/description text you can use for a listing, post, or caption about the 2012 special edition of "Barcelona" by Freddie Mercury & Montserrat Caballé — tuned to the search-like phrase you provided: The primary "better" qualities of the 2012 edition
Here’s a solid, unbiased review of the (released to coincide with the 2012 Olympics and the 25th anniversary of the original album). The primary "better" qualities of the 2012 edition