The Orthodox Church, is a global communion wherein local Churches are not free to completely govern themselves but are under the spiritual guidance of a Bishop and/or Patriarch. There are separate communities within the Orthodox Church but we are united in our recognition of the other jurisdictions. The Greek Church recognizes the Bulgarian Church for example or the Russian Church recognizes the Antiochian Church.
All of which are in communion with one another. The location of the patriarchate and cultural/language tendencies being the primary difference. Theologically, they are all the same church.
Some Baptists are evangelical and some are not. I could be wrong, but I believe that the Convención Evangélica Bautista Argentina is not evangelical.
Baptists and Orthodox are about as different as two branches of Christianity can be.
Baptists would have a much simpler liturgy; they would have a radically different view of the sacraments; they would not baptise babies; and there would be many theological differences.