'>'(redirection) will redirect the output of any command to any file.
eg.
ls -al > list.txt
copies the output of "ls -al" to "list.txt".
Now
'|' (pipe) is used when we want to use output of one command as input to another command.
eg.
ls -al | grep myfile
search my file in the list of files in present directory. Output of "ls -al" used as input to grep command.
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