As nouns the difference between loggan and loogan
is that loggan is alternative form of lang=en while loogan is a fool.
loogan
English
Noun
(
en noun)
A fool.
*1939 , (Raymond Chandler), The Big Sleep , Penguin 2011, p. 160:
*:‘You think he sent that loogan after you?’
*:‘What's a loogan ?’
*:‘A guy with a gun.’