I guess you meant Non-clustered Index and Clustered Index. Is that right?

Since you have mentioned any huge difference between them, I am not sure what have you found and understood about them till now.

The first and most basic and notable difference between them is the Leaf level Page of a Clustered Index is the data itself where as the leaf level page of a clustered index contains the pointer to the data.

There are few other differences, but not sure what are those that you are already know.

In other words, when you create a clustered index, the table itself is sorted in the specified order. When you create a non clustered index, a new index table is created that contains the index key and points back to each row in the table.