Of course there are important differences, mainly in that the Nicene Creed is longer and more detailed...as it dealt with different heresies at a different time the "Hippoclytus Old Roman Creed" (the Apostles Creed).
My point is that ALL orthodox Christians, Catholic and Protestant affirm both these creeds. (Eastern Orthodox affirm them both too, with the exception of the 'filioque', "proceeds from the Father (and the Son)" clause, where they omit "the Son" part.
Some Protestants don't say them, or even acknowlege them, never-the-less, standard theology...of Baptists, Bible, (most) Pentacostals, Mennonites, besides Anglican, Presbyterian, Methodists and Lutherans etc. ALL affirm both the Apostles and the Nicene creeds.
I would go so far to say that any that do NOT have theology in accord with those creeds can rightly be catagorized as sub-Christian cults.
Agreed...amazing...agreement on FR!