rsync vs scp

[dreamwvr <dreamwvr@dreamwvr.com>]

hi,
   Been looking at using rsync to keep in sync 2 separate directories..
(mirror) only part of a directory structure. IOW on a development system

for example..
host1:/mydevdir/mydevsubs/
with  a production system
host2:/myproddir/myprodsubs/
where the directory names as identical it is just the content that
differs with
the development server updating the production server with the changes
every
hour. Having sed that tend to use scp for such now but was considering
rsync
since it reads to be superior for such tasks. is it. What is the right
syntax for
using it with ssh? i am assuming that it requires one to use rsyncd on
the system
to be synced with development. It reads like it has a lot of quite
dangerous trappings..
is this still the case? TIA