Following from #1183 (comment)

Currently match patterns do not care about the order, as the patterns cannot be overlapping (aside from else, which is currently defined as "all cases not mentioned in the match"), so pattern order is ignored in enum matches.
Conversely, pattern order is significant in value matches, where we go down the list of values, checking for equality.

The first one allows matches like

match foo {
    else => x
    A => y
}

to yield y for A, which is dissimilar to other languages.