Very different. The authentic conciliar teachings to which you refer were adopted firstly by the proper teaching office in the Church, i.e., the successors of the apostles in union with the successor of Peter. And the doctrinal definitions were based on concepts found in Tradition and were natural and organic explanations and developments within the confines of Scripture and Tradition. They are, as John Henry Newman would say, authentic development of doctrine, not reversals of the deposit of faith. The teachings of GC 2003 on same sex unions and episcopal homosexual activity have no basis in Scripture and Tradition and in fact contradict Scripture, Tradition and the constant and universal teaching of the Church based on them. It is a reversal of the teachings of the deposit of faith, not an organic development. Look to Newman!
Indeed, US!
"In their conferences, the Holy Synods draw not only from the Holy Scriptures, but also from Sacred Tradition as from a pure fount. Thus, the Seventh Oecumenical Synod says in its 8th Decree: 'If one violates any part of the Church Tradition, either written or unwritten, let him be anathema.'" St. Nectarios of Aegina, Modern Orthodox Saints, Vol. 7
To an evangelical, the concept of the development of doctine is foreign (although they develop doctrine as well). For example, evangelicals point to St Paul's declaration that Christ is our only mediator as being contradicted by the dogma of Mary being the mediatrix. Most complaints about Catholicism by evangelicals center around Mariology. They further point to growing support of the doctrine that Mary is co-redemptrix. Just as the Episcopal Church has taken the notions of inclusion and social justice way too far; so have some in the Catholic Church taken Mariology too far.
Ultimately, no two churches will agree on everything. Even every parish does things different. Does anyone actually believe the Cardinals are in complete agreement with each other on everything all the time? No. Are they all in Communion with each other? Yes. Where should the line be drawn?