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There is no difference between both of them. LR(1) by default is CLR(1).

It uses cannonical collection of LR(1) items.
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  • LR(0)
  • LR(1)
    • SLR(1)
    • LALR(1)
    • CLR(1)

In practice CLR(1) is called as LR(1) because it has more powerful among LR(1)s.

But in actual it is a type of LR(1)

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