@areev19:
Main difference between OVI Suite 1.x and Nokia PC Suite

Main difference is Contact and Message editors !!! With the help of Nokia PC Suite, you can edit your Contacts as well as you can send messages from pc when your phone is connected with the help of Nokia Communicatin Centre, which is not present as of now in Nokia NSeries/Nokia OVI Suite. This is the major difference.

Then some applications like Image Store, Nokia Music Manager and File Manager(phone browser) are there in normal Nokia PC Suite whereas, Nokia OVI Suite has got stand alone applications like Nokia Music(replacement for Music manager in Nokia PC Suite), Home Media Server, Nokia Photos(Replacement for Nokia Lifeblog), etc are present in Nokia OVI Suite.

Applications like NSeries Music Manager and NSeries Video Manager were not there in Nokia OVI Suite. NSeries PC Suite was almost replaced by Nokia OVI Suite nowadays !!!!

Apart from this you can download stand alone applications like Nokia Map Loader, Nokia Software Updater(it will download along with both Nokia PC Suite as well as Nokia OVI Suite while installing), Nokia photos ....

Applications like Content Copier, Nokia Application Installer, Nokia PC Sync are common to both Nokia PC Suite and Nokia OVI Suite.

When it comes to user perspective, they feel Nokia PC Sync is much easier to use than Nokia OVI Suite's sync.

In latest Nokia OVI Suite 2.0.1.35, Some modification has been done, including Sending SMS and receiving SMS.

Source

when u open both application, u will see the differences. Both have some similar function, but oso some different function.
i only using PC suit. Bocs i found that OVI suit abit lag