TFC said in part.....
"I dont need to know the technical stuff, just basically any external VISUAL differences."
Aviate 1138 says, trying to avoid being sarcastic, I have just Googled 'Airbus A320' and got 5,790 images in 0.11 seconds - 'Boeing 737', in 0.08 seconds produced 26,500 images.....
Not too difficult for a Flying Cop to do is it?
"One image avoids a thousand words"

You were asking for "VISUAL differences"
Aviate1138