He has fired blanks until his penalty in last week's 3-1 win over West Ham.
Hooper, 25, said: "It's a much better standard all round in England. Bigger teams, better teams and players just don't make mistakes in the same way.
"For Celtic, I would get a good few chances over the course of 90 minutes but in the Premier League they're so few and far between.
"If you get a chance, you really need to take it."
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