I will order Visual basic 6.0 soon and I wonder what the differences are between the Professional and the Enterprise package?

It is crucial that the OLE tools and the "Package & Deploy Wizard" are included. Are these tools included in both the packages?

Yes, both versions contain those... Get the enterprise!

Most definitely the Enterprise Edition.

I don't think that version is available any more.
That has been de-supported by the parent company.

Both versions have been out of support for some time now... I.E. .NET's arrival! But one can still find legal copies at ebay, or at nextag.com for both pro and ent versions of both VB and VS