which sql syntax is better for joins on pgsql?

Hi all...one question..which sql syntax for joins will perform better on
pgsql..
something like xxx OUTER JOIN yyy or SELECT xxx,yyy FROM bbb,ccc WHERE
bbb.xxx = ccc.yyy ??
Are there any performance differences in executing these to queries in pg or
will they be the same in means of time and resources??
I'm asking this because i'm tranferring an access97 db to postgres and i am
using passthrough queries from access which are written as the first one i
listed..

Thanks to all!