In 1998 I bought my first set of Snap on sockets the chrome 3/8"dr shallow 6pt 1/4 to 1" set I have never had any complaints, in most of the years I have had them they have been used on heavy equipment and heavy trucks, I have never had to warranty a single one, since then I have never had anything but SO sockets from 1/4"dr to 1/2"dr all the way up to 1 1/2" and 36mm and never had a complaint or a problem with any of them
All that being said I have been in big equipment shops with mechanics next to me would have all sorts of different brands of sockets they would often come to me to borrow one until the mac, matco or cornwell truck came around so they could get theirs warrantied,
I think with sockets, brand does matter
For me Snap on all the way, "buy ONCE cry once"