1 Religion is a major difference: most Scots are Presbyterians; most Irish are Catholics. 2  The Catholic minority in Scotland is largely Irish in origin. 3  The Presbyterians of Northern Ireland are mostly Scottish in origin. The Catholic minority in Scotland is largely Irish in origin. 2  The Presbyterians of Northern Ireland are mostly Scottish in origin. 3  The reason there are so many Presbyterians in Scotland is because of the 1707 act of Union,The Cromwell Invasion, and forced conversion of Scottish Catholics by the covenanters.
Great Britain, also known as Britain /ËbrÉª.tÉn/ , is an island in the North Atlantic off the north-west coast of continental Europe. With an area of 209,331 km 2 (80,823 sq mi), it is the largest island in Europe and the ninth-largest in the world.he term Britain, as opposed to Great Britain, has been used to mean the United Kingdom formally, for example in official government yearbooks between 1975 and 2001. Since 2002, however, the yearbooks have only used the term United Kingdom.
great britain is made up of scotland england and wales where as britain is just england and wales the name britain goes back to roman times when they called england and wales britannia or britannia major to distinguished from britannia minor ie brittany in france hundred years later the act of union of 1801 joined ireland to great britain and the name united kingdom of great britain and ireland was first used since 1921 only northern ireland has been part of the united kingdom and so the name changed