If I had the money...

…I’d totally start a vintage road bike project around these hubs
http://cgi.ebay.com.au/NOS-Vintage-Campagnolo-Record-HiLo-28-Hole-hubs-6sp_W0QQitemZ300405530003QQcmdZViewItemQQptZLH_DefaultDomain_0?hash=item45f1909d93#ht_500wt_1182

Forgive my naivety, but how is the hi-lo set-up better?