哪种格式的nginx重写更有效?

当我重构我的站点时,我有许多在.htaccess中的重定向。现在我想为nginx重新创建它们。以下是等效样式吗?哪种样式更有效?

# Style A
location / {
    location /foo/123/old {
        rewrite ^(.*) /bar/123/ permanent;
    }
    location /baz/456/old {
        rewrite ^(.*) /bar/456/ permanent;
    }
}

# Style B
location / {
    rewrite ^/foo/123/old\/?$ /bar/123/ permanent;
    rewrite ^/baz/456/old/\/?$ /bar/456/ permanent;
}