Conflicting HTACCESS files? Please advise

i have both rc8x vbseo and 1.7 site map.

the rc8 comes with this
RewriteRule ^((urllist|sitemap_).*\.(xml|txt)(\.gz)?)$ vbseo_sitemap/vbseo_getsitemap.php?sitemap=$1 [L]


while the site map htaccess has this

RewriteRule ^((urllist|sitemap).*\.(xml|txt)(\.gz)?)$ vbseo_sitemap/vbseo_getsitemap.php?sitemap=$1 [L]

Which should we be using with both vbseo / 1.7 sitemapping?

The default vBSEO .htaccess file contains everything you need for vBSEO and vBSEO Sitemap, so use that one.