When these films were originally made, the original opening and ending title sequences featured a "RKO logo". In later years the opening and ending title sequences were changed to a "Buena Vista logo". As they are currently, on the "Snow White and the Seven Dwarfs (1937)" listing pages there are no notes that mention the use of x2 opening and ending title sequences.
http://www.dvdcompare.net/comparisons/film.php?fid=1076
http://www.dvdcompare.net/comparisons/f ... ?fid=15262
Different home-media releases over the years (and possibly in different countries) I think have used either version of these logo sequences. Many of the "Snow White and the Seven Dwarfs (1937)" DVD releases listed on this site for example say they include the "RKO logo" as DVD-extra-content (and am guessing these particular DVD releases use the "Buena Vista logo" in the main film feature). Other releases are unknown what versions they contain.
"Snow White and the Seven Dwarfs (1937)" IMDB says: https://www.imdb.com/title/tt0029583/alternateversions
Prior to 1954, Disney's films were distributed by RKO Radio Pictures. The original opening title sequence featured the RKO logo in it. In 1955, Disney created and started using Buena Vista Pictures Distribution. Beginning with the 1958 reissue, the opening title cards were replaced, with the RKO logo removed, and the Buena Vista logo inserted. The original opening and ending titles with the RKO references were included as bonus material on the 2001 Platinum Edition DVD and 1994 special edition laser disc, but were not restored to the actual film until the 2009 Diamond Edition DVD and Blu-ray releases.
Also I think the following youtube video is the DVD-extra feature taken from one of the "Snow White and the Seven Dwarfs (1937)" DVD's which talks about the RKO / Buena-Vista logos too (am not sure if it helps though): https://www.youtube.com/watch?v=tpuG5hpfK9g
Can notes be added about the RKO / Buena-Vista logos changes made to the "Snow White" pages? Also if so, possibly other classic Disney films ***up to "Peter Pan (1953)" I think*** could use notes about RKO / Buena-Vista logos. The changes occurred on the following Disney title IMDB links that I know of:
Pinocchio: https://www.imdb.com/title/tt0032910/al ... _=tt_ql_sm
Dumbo: https://www.imdb.com/title/tt0033563/al ... _=tt_ql_sm
Bambi: https://www.imdb.com/title/tt0034492/al ... _=tt_ql_sm
Cinderella: https://www.imdb.com/title/tt0042332/al ... _=tt_ql_sm
Alice In Wonderland: https://www.imdb.com/title/tt0043274/al ... _=tt_ql_sm
Peter Pan: https://www.imdb.com/title/tt0046183/al ... _=tt_ql_sm
(I don't know about all the Disney films around these time periods though - there are probably some others similarly affected)
The only dvdcompare listing pages I have found that mention notes about RKO / Buena-Vista logos changes are on "Bambi (1942)" DVD + BLURAY pages.