From wiki answers..
As far as the words and liturgy are concerned, there is very little difference between the RC mass and an Anglican Communion service. Both services have the same elements, including a Gathering of People, Confession and Absolution, listening to scripture read, a sermon or homily, a Creed, Intercessionary prayers, The Peace, the Prayer of Consecration, The Breaking of Bread, the distribution of the bread and wine, a closing prayer of thanksgiving and a dismissal, but these eclipse the huge gulf that exists between the differences in belief that surround these elements, however.
The main differences are in belief surrounding the mass or the communion service. Roman Catholics believe in transubstantiation - the bread and wine actually turning into the body and blood of Christ. The catholic wing of the Anglican Church also has this belief, but the majority of Anglicans do not - instead believing in the bread and wine being symbolic of Christ's body and blood. Therefore, whereas in RC churches the blood and wine are reserved in a small cupboard called an aumbry (if in a wall) or a tabernacle (if in the altar itself) and is revered, in most Anglican Churches this is regarded almost as idolatry and the bread and wine are not revered or reserved, but consumed reverently at the end of each communion service.
Roman Catholics also regard the mass as the re-sacrifice of Jesus each time the mass is said. They justify this approach by the breaking of Christ's body (the bread) and the pouring out of Christ's blood (the wine), and, as they believe that the bread and wine are his body and blood, the resacrifice takes place each time it the bread is broken. However, Anglicans point to the scriptures which state that Christ's sacrifice was a once-and-for-all event and regard the mass as a re-sacrifice as against scripture and rather repugnant. Instead, the emphasis is placed on Jesus' words "do this in remembrance of me" and therefore they regard the communion service as a thanksgiving for his sacrifice and a memorial of his death and passion. Therefore, the subtle changes in words represent a huge difference in doctrine. As just one example, after the consecration of the bread and wine, the Anglican priest will say "Jesus is the Lamb of God that takes away the sins of the world" - quoting scripture. However, the same phrase in the RC service reads "This is the Lamb of God that takes away the sins of the world" as the priest raises the bread and wine. A difference of only one word, but a huge difference in belief. Moreover, whereas in the Anglican Church the people receive both the bread and wine as a memorial, in the RC church the people usually receive the bread alone, the wine reserved for the priest alone as an intercessor on behalf of the people.
