Are these two functions "the same" ?

gistfile1.ex

def delete(bucket, key) do
   Agent.get_and_update(bucket, &HashDict.pop(&1, key))
end

vs.

def delete(bucket, key) do
 Agent.get_and_update(bucket, 
   fn dict -> HashDict.pop(dict, key)
 end)
end

Because they change the implementation at this link from the one on lines 1-3 to the one on lines 7-11 (my file)