The Catholic Sunday Masses are considered a Solemnity. In the Catholic Church we have different types of feast days, some of which are solemnities. Aside from Sundays, there are 8 other Solemnities (such as Christmas and All Saints Day) that the CC celebrates, and many feast days.
On a Solemnity, and certain feastdays, all of the prayers are done, usually with singing. In addition, TWO readings are done - one from the OT, and one from the NT, as well as the Psalm and the Gospel. One of the biggest differences is that the Gloria is sung and the Nicene Creed is said on a Sunday and Solemnity, and some other feast days. These prayers are not done on an ordinary weekday Mass. Usually, there is no singing, or very little, and there is only one reading, psalm and the Gospel.
As for your question about Protestant v.s. Catholic Mass, Lutherans and Episcopalians have a service that is similar because they base it off of the Catholic service, but as a Catholic, we believe that they have fallen out of the Apostolic succession, and therefore, do not have a valid Mass (AKA... the bread and wine are not changed into the Body and Blood of Christ) so consecration and transubstantiation do not take place at their service, even if they say similar prayers.