Funny, I suspect the difference is subtle - but I don't care for English Breakfast.
I usually buy Taylors of Harrogate tea. Here are the descriptions:
Originally blended for the soft waters of Scotland, this traditional Scottish Breakfast blend can be enjoyed wherever you live. It's a blend of the very best Assam and African teas,
with an inviting bright colour in the cup and a full, rich flavour, which makes it perfect for serving at breakfast time.
A strong, rich blend of Assam and east African teas. A traditional Irish blend of top quality Assam and east African teas, It has a wonderfully robust flavour, strong and rich, with a
bright, rosy liquor in the cup. Our Irish breakfast tea is an absolutely perfect way to greet the day, but its reviving, full-bodies taste will be welcome ay any time.